Re: Beamer/overprint

[Paul A . Rubin]

Patrick Dupre pdupre at gmx.com writes:

 
 Sorry, but in my case, in overprint environment, when I highlight the 
 picture for example, I cannot switch to center. This is not an option 
 of paragraph setting like it should. I can only unstick/stick the indent
 paragraph. That is all!
 Why?

I cannot answer why, but for me this is how it works:

1. Insert the overprint environment (and set the option to indicate on which
slides it should display).

2. In the overprint environment, insert a frameless box. (I switched it to a
parbox, but it's possible a minipage would work as well.) Leave the width at
100%, which is believe is the default setting.

3. Click inside the box and use the paragraph settings menu to set it to center.

4. Insert the graphic.

So centering is handled by the paragraph, not by a setting for the image.
Also, to be clear, I am not inserting an image float, just the image itself.

Re: Beamer/overprint

[Patrick Dupre]

Hello,

Sorry, but in my case, in overprint environment, when I highlight the 
picture for example, I cannot switch to center. This is not an option 
of paragraph setting like it should. I can only unstick/stick the indent
paragraph. That is all!
Why?

===
 Patrick DUPRÉ | | email: pdu...@gmx.com
 Laboratoire de Physico-Chimie de l'Atmosphère | |
 Université du Littoral-Côte d'Opale   | |
 Tel.  (33)-(0)3 28 23 76 12   | | Fax: 03 28 65 82 44
 189A, avenue Maurice Schumann | | 59140 Dunkerque, France
===


 Sent: Sunday, May 17, 2015 at 10:43 PM
 From: Paul A. Rubin ru...@msu.edu
 To: lyx-users@lists.lyx.org
 Subject: Re: Beamer/overprint

 Patrick Dupre pdupre at gmx.com writes:
 

I cannot have a centered picture in overprint (beamer) environment!
Is there a tips?

   Centered horizontally or centered vertically?
   
  Horizontally
 
 Works for me if I surround it with a parbox. I'm attaching a small example
 (using one of the LyX icons as the graphic).
 
 Paul
 
 #LyX 2.1 created this file. For more info see http://www.lyx.org/
 \lyxformat 474
 \begin_document
 \begin_header
 \textclass beamer
 \use_default_options true
 \maintain_unincluded_children false
 \language english
 \language_package default
 \inputencoding auto
 \fontencoding global
 \font_roman default
 \font_sans default
 \font_typewriter default
 \font_math auto
 \font_default_family default
 \use_non_tex_fonts false
 \font_sc false
 \font_osf false
 \font_sf_scale 100
 \font_tt_scale 100
 \graphics default
 \default_output_format default
 \output_sync 0
 \bibtex_command default
 \index_command default
 \paperfontsize default
 \spacing single
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 \papersize letterpaper
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 \use_package cancel 1
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 \quotes_language english
 \papercolumns 1
 \papersides 1
 \paperpagestyle default
 \tracking_changes false
 \output_changes false
 \html_math_output 0
 \html_css_as_file 0
 \html_be_strict false
 \end_header
 
 \begin_body
 
 \begin_layout Frame
 \begin_inset Argument 4
 status open
 
 \begin_layout Plain Layout
 Frame with Graphic Overprint
 \end_layout
 
 \end_inset
 
 
 \begin_inset Argument 3
 status open
 
 \begin_layout Plain Layout
 +-
 \end_layout
 
 \end_inset
 
 
 \end_layout
 
 \begin_deeper
 \begin_layout Itemize
 A
 \end_layout
 
 \begin_layout Itemize
 B
 \end_layout
 
 \begin_layout Overprint
 \begin_inset Argument item:1
 status open
 
 \begin_layout Plain Layout
 2
 \end_layout
 
 \end_inset
 
 
 \begin_inset Box Frameless
 position t
 hor_pos c
 has_inner_box 1
 inner_pos t
 use_parbox 1
 use_makebox 0
 width 100col%
 special none
 height 1in
 height_special totalheight
 status open
 
 \begin_layout Plain Layout
 \noindent
 \align center
 \begin_inset Graphics
   filename /usr/share/lyx/images/unknown.png
 
 \end_inset
 
 
 \end_layout
 
 \end_inset
 
 
 \end_layout
 
 \begin_layout Itemize
 C
 \end_layout
 
 \end_deeper
 \end_body
 \end_document
 

Re: Beamer/overprint

[Paul A . Rubin]

 
 I cannot have a centered picture in overprint (beamer) environment!
 Is there a tips?
 
Centered horizontally or centered vertically?

Re: Beamer/overprint

[Patrick Dupre]

===
 Patrick DUPRÉ | | email: pdu...@gmx.com
 Laboratoire de Physico-Chimie de l'Atmosphère | |
 Université du Littoral-Côte d'Opale   | |
 Tel.  (33)-(0)3 28 23 76 12   | | Fax: 03 28 65 82 44
 189A, avenue Maurice Schumann | | 59140 Dunkerque, France
===


 Sent: Sunday, May 17, 2015 at 10:20 PM
 From: Paul A. Rubin ru...@msu.edu
 To: lyx-users@lists.lyx.org
 Subject: Re: Beamer/overprint

  
  I cannot have a centered picture in overprint (beamer) environment!
  Is there a tips?
  
 Centered horizontally or centered vertically?
 
Horizontally

Re: Beamer/overprint

[Paul A . Rubin]

Patrick Dupre pdupre at gmx.com writes:

   
   I cannot have a centered picture in overprint (beamer) environment!
   Is there a tips?
   
  Centered horizontally or centered vertically?
  
 Horizontally

Works for me if I surround it with a parbox. I'm attaching a small example
(using one of the LyX icons as the graphic).

Paul

#LyX 2.1 created this file. For more info see http://www.lyx.org/
\lyxformat 474
\begin_document
\begin_header
\textclass beamer
\use_default_options true
\maintain_unincluded_children false
\language english
\language_package default
\inputencoding auto
\fontencoding global
\font_roman default
\font_sans default
\font_typewriter default
\font_math auto
\font_default_family default
\use_non_tex_fonts false
\font_sc false
\font_osf false
\font_sf_scale 100
\font_tt_scale 100
\graphics default
\default_output_format default
\output_sync 0
\bibtex_command default
\index_command default
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\spacing single
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\papersize letterpaper
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\use_package amsmath 1
\use_package amssymb 1
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\use_package mathdots 1
\use_package mathtools 1
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\use_bibtopic false
\use_indices false
\paperorientation portrait
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\justification true
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\index Index
\shortcut idx
\color #008000
\end_index
\leftmargin 1in
\topmargin 1in
\rightmargin 1in
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\secnumdepth 3
\tocdepth 3
\paragraph_separation skip
\defskip smallskip
\quotes_language english
\papercolumns 1
\papersides 1
\paperpagestyle default
\tracking_changes false
\output_changes false
\html_math_output 0
\html_css_as_file 0
\html_be_strict false
\end_header

\begin_body

\begin_layout Frame
\begin_inset Argument 4
status open

\begin_layout Plain Layout
Frame with Graphic Overprint
\end_layout

\end_inset


\begin_inset Argument 3
status open

\begin_layout Plain Layout
+-
\end_layout

\end_inset


\end_layout

\begin_deeper
\begin_layout Itemize
A
\end_layout

\begin_layout Itemize
B
\end_layout

\begin_layout Overprint
\begin_inset Argument item:1
status open

\begin_layout Plain Layout
2
\end_layout

\end_inset


\begin_inset Box Frameless
position t
hor_pos c
has_inner_box 1
inner_pos t
use_parbox 1
use_makebox 0
width 100col%
special none
height 1in
height_special totalheight
status open

\begin_layout Plain Layout
\noindent
\align center
\begin_inset Graphics
filename /usr/share/lyx/images/unknown.png

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Itemize
C
\end_layout

\end_deeper
\end_body
\end_document

Re: Beamer/overprint

[Paul A . Rubin]

 
 I cannot have a centered picture in overprint (beamer) environment!
 Is there a tips?
 
Centered horizontally or centered vertically?

Re: Beamer/overprint

[Patrick Dupre]

===
 Patrick DUPRÉ | | email: pdu...@gmx.com
 Laboratoire de Physico-Chimie de l'Atmosphère | |
 Université du Littoral-Côte d'Opale   | |
 Tel.  (33)-(0)3 28 23 76 12   | | Fax: 03 28 65 82 44
 189A, avenue Maurice Schumann | | 59140 Dunkerque, France
===


 Sent: Sunday, May 17, 2015 at 10:20 PM
 From: Paul A. Rubin ru...@msu.edu
 To: lyx-users@lists.lyx.org
 Subject: Re: Beamer/overprint

  
  I cannot have a centered picture in overprint (beamer) environment!
  Is there a tips?
  
 Centered horizontally or centered vertically?
 
Horizontally

Re: Beamer/overprint

[Paul A . Rubin]

Patrick Dupre pdupre at gmx.com writes:

   
   I cannot have a centered picture in overprint (beamer) environment!
   Is there a tips?
   
  Centered horizontally or centered vertically?
  
 Horizontally

Works for me if I surround it with a parbox. I'm attaching a small example
(using one of the LyX icons as the graphic).

Paul

#LyX 2.1 created this file. For more info see http://www.lyx.org/
\lyxformat 474
\begin_document
\begin_header
\textclass beamer
\use_default_options true
\maintain_unincluded_children false
\language english
\language_package default
\inputencoding auto
\fontencoding global
\font_roman default
\font_sans default
\font_typewriter default
\font_math auto
\font_default_family default
\use_non_tex_fonts false
\font_sc false
\font_osf false
\font_sf_scale 100
\font_tt_scale 100
\graphics default
\default_output_format default
\output_sync 0
\bibtex_command default
\index_command default
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\spacing single
\use_hyperref false
\papersize letterpaper
\use_geometry true
\use_package amsmath 1
\use_package amssymb 1
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\shortcut idx
\color #008000
\end_index
\leftmargin 1in
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\tocdepth 3
\paragraph_separation skip
\defskip smallskip
\quotes_language english
\papercolumns 1
\papersides 1
\paperpagestyle default
\tracking_changes false
\output_changes false
\html_math_output 0
\html_css_as_file 0
\html_be_strict false
\end_header

\begin_body

\begin_layout Frame
\begin_inset Argument 4
status open

\begin_layout Plain Layout
Frame with Graphic Overprint
\end_layout

\end_inset


\begin_inset Argument 3
status open

\begin_layout Plain Layout
+-
\end_layout

\end_inset


\end_layout

\begin_deeper
\begin_layout Itemize
A
\end_layout

\begin_layout Itemize
B
\end_layout

\begin_layout Overprint
\begin_inset Argument item:1
status open

\begin_layout Plain Layout
2
\end_layout

\end_inset


\begin_inset Box Frameless
position t
hor_pos c
has_inner_box 1
inner_pos t
use_parbox 1
use_makebox 0
width 100col%
special none
height 1in
height_special totalheight
status open

\begin_layout Plain Layout
\noindent
\align center
\begin_inset Graphics
filename /usr/share/lyx/images/unknown.png

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Itemize
C
\end_layout

\end_deeper
\end_body
\end_document

Re: Beamer/overprint

[Patrick Dupre]

Hello,

Sorry, but in my case, in overprint environment, when I highlight the 
picture for example, I cannot switch to center. This is not an option 
of paragraph setting like it should. I can only unstick/stick the indent
paragraph. That is all!
Why?

===
 Patrick DUPRÉ | | email: pdu...@gmx.com
 Laboratoire de Physico-Chimie de l'Atmosphère | |
 Université du Littoral-Côte d'Opale   | |
 Tel.  (33)-(0)3 28 23 76 12   | | Fax: 03 28 65 82 44
 189A, avenue Maurice Schumann | | 59140 Dunkerque, France
===


 Sent: Sunday, May 17, 2015 at 10:43 PM
 From: Paul A. Rubin ru...@msu.edu
 To: lyx-users@lists.lyx.org
 Subject: Re: Beamer/overprint

 Patrick Dupre pdupre at gmx.com writes:
 

I cannot have a centered picture in overprint (beamer) environment!
Is there a tips?

   Centered horizontally or centered vertically?
   
  Horizontally
 
 Works for me if I surround it with a parbox. I'm attaching a small example
 (using one of the LyX icons as the graphic).
 
 Paul
 
 #LyX 2.1 created this file. For more info see http://www.lyx.org/
 \lyxformat 474
 \begin_document
 \begin_header
 \textclass beamer
 \use_default_options true
 \maintain_unincluded_children false
 \language english
 \language_package default
 \inputencoding auto
 \fontencoding global
 \font_roman default
 \font_sans default
 \font_typewriter default
 \font_math auto
 \font_default_family default
 \use_non_tex_fonts false
 \font_sc false
 \font_osf false
 \font_sf_scale 100
 \font_tt_scale 100
 \graphics default
 \default_output_format default
 \output_sync 0
 \bibtex_command default
 \index_command default
 \paperfontsize default
 \spacing single
 \use_hyperref false
 \papersize letterpaper
 \use_geometry true
 \use_package amsmath 1
 \use_package amssymb 1
 \use_package cancel 1
 \use_package esint 1
 \use_package mathdots 1
 \use_package mathtools 1
 \use_package mhchem 1
 \use_package stackrel 1
 \use_package stmaryrd 1
 \use_package undertilde 1
 \cite_engine basic
 \cite_engine_type default
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 \use_bibtopic false
 \use_indices false
 \paperorientation portrait
 \suppress_date false
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 \use_refstyle 1
 \index Index
 \shortcut idx
 \color #008000
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 \topmargin 1in
 \rightmargin 1in
 \bottommargin 1in
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 \tocdepth 3
 \paragraph_separation skip
 \defskip smallskip
 \quotes_language english
 \papercolumns 1
 \papersides 1
 \paperpagestyle default
 \tracking_changes false
 \output_changes false
 \html_math_output 0
 \html_css_as_file 0
 \html_be_strict false
 \end_header
 
 \begin_body
 
 \begin_layout Frame
 \begin_inset Argument 4
 status open
 
 \begin_layout Plain Layout
 Frame with Graphic Overprint
 \end_layout
 
 \end_inset
 
 
 \begin_inset Argument 3
 status open
 
 \begin_layout Plain Layout
 +-
 \end_layout
 
 \end_inset
 
 
 \end_layout
 
 \begin_deeper
 \begin_layout Itemize
 A
 \end_layout
 
 \begin_layout Itemize
 B
 \end_layout
 
 \begin_layout Overprint
 \begin_inset Argument item:1
 status open
 
 \begin_layout Plain Layout
 2
 \end_layout
 
 \end_inset
 
 
 \begin_inset Box Frameless
 position t
 hor_pos c
 has_inner_box 1
 inner_pos t
 use_parbox 1
 use_makebox 0
 width 100col%
 special none
 height 1in
 height_special totalheight
 status open
 
 \begin_layout Plain Layout
 \noindent
 \align center
 \begin_inset Graphics
   filename /usr/share/lyx/images/unknown.png
 
 \end_inset
 
 
 \end_layout
 
 \end_inset
 
 
 \end_layout
 
 \begin_layout Itemize
 C
 \end_layout
 
 \end_deeper
 \end_body
 \end_document
 

Re: Beamer/overprint

[Paul A . Rubin]

Patrick Dupre pdupre at gmx.com writes:

 
 Sorry, but in my case, in overprint environment, when I highlight the 
 picture for example, I cannot switch to center. This is not an option 
 of paragraph setting like it should. I can only unstick/stick the indent
 paragraph. That is all!
 Why?

I cannot answer why, but for me this is how it works:

1. Insert the overprint environment (and set the option to indicate on which
slides it should display).

2. In the overprint environment, insert a frameless box. (I switched it to a
parbox, but it's possible a minipage would work as well.) Leave the width at
100%, which is believe is the default setting.

3. Click inside the box and use the paragraph settings menu to set it to center.

4. Insert the graphic.

So centering is handled by the paragraph, not by a setting for the image.
Also, to be clear, I am not inserting an image float, just the image itself.

Re: Beamer/overprint

[Paul A . Rubin]

> 
> I cannot have a centered picture in overprint (beamer) environment!
> Is there a tips?
> 
Centered horizontally or centered vertically?

Re: Beamer/overprint

[Patrick Dupre]

===
 Patrick DUPRÉ | | email: pdu...@gmx.com
 Laboratoire de Physico-Chimie de l'Atmosphère | |
 Université du Littoral-Côte d'Opale   | |
 Tel.  (33)-(0)3 28 23 76 12   | | Fax: 03 28 65 82 44
 189A, avenue Maurice Schumann | | 59140 Dunkerque, France
===


> Sent: Sunday, May 17, 2015 at 10:20 PM
> From: "Paul A. Rubin" 
> To: lyx-users@lists.lyx.org
> Subject: Re: Beamer/overprint
>
> > 
> > I cannot have a centered picture in overprint (beamer) environment!
> > Is there a tips?
> > 
> Centered horizontally or centered vertically?
> 
Horizontally

Re: Beamer/overprint

[Paul A . Rubin]

Patrick Dupre  gmx.com> writes:

> > > 
> > > I cannot have a centered picture in overprint (beamer) environment!
> > > Is there a tips?
> > > 
> > Centered horizontally or centered vertically?
> > 
> Horizontally

Works for me if I surround it with a parbox. I'm attaching a small example
(using one of the LyX icons as the graphic).

Paul

#LyX 2.1 created this file. For more info see http://www.lyx.org/
\lyxformat 474
\begin_document
\begin_header
\textclass beamer
\use_default_options true
\maintain_unincluded_children false
\language english
\language_package default
\inputencoding auto
\fontencoding global
\font_roman default
\font_sans default
\font_typewriter default
\font_math auto
\font_default_family default
\use_non_tex_fonts false
\font_sc false
\font_osf false
\font_sf_scale 100
\font_tt_scale 100
\graphics default
\default_output_format default
\output_sync 0
\bibtex_command default
\index_command default
\paperfontsize default
\spacing single
\use_hyperref false
\papersize letterpaper
\use_geometry true
\use_package amsmath 1
\use_package amssymb 1
\use_package cancel 1
\use_package esint 1
\use_package mathdots 1
\use_package mathtools 1
\use_package mhchem 1
\use_package stackrel 1
\use_package stmaryrd 1
\use_package undertilde 1
\cite_engine basic
\cite_engine_type default
\biblio_style plain
\use_bibtopic false
\use_indices false
\paperorientation portrait
\suppress_date false
\justification true
\use_refstyle 1
\index Index
\shortcut idx
\color #008000
\end_index
\leftmargin 1in
\topmargin 1in
\rightmargin 1in
\bottommargin 1in
\secnumdepth 3
\tocdepth 3
\paragraph_separation skip
\defskip smallskip
\quotes_language english
\papercolumns 1
\papersides 1
\paperpagestyle default
\tracking_changes false
\output_changes false
\html_math_output 0
\html_css_as_file 0
\html_be_strict false
\end_header

\begin_body

\begin_layout Frame
\begin_inset Argument 4
status open

\begin_layout Plain Layout
Frame with Graphic Overprint
\end_layout

\end_inset


\begin_inset Argument 3
status open

\begin_layout Plain Layout
<+->
\end_layout

\end_inset


\end_layout

\begin_deeper
\begin_layout Itemize
A
\end_layout

\begin_layout Itemize
B
\end_layout

\begin_layout Overprint
\begin_inset Argument item:1
status open

\begin_layout Plain Layout
2
\end_layout

\end_inset


\begin_inset Box Frameless
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 1
use_makebox 0
width "100col%"
special "none"
height "1in"
height_special "totalheight"
status open

\begin_layout Plain Layout
\noindent
\align center
\begin_inset Graphics
filename /usr/share/lyx/images/unknown.png

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Itemize
C
\end_layout

\end_deeper
\end_body
\end_document

Re: Beamer/overprint

[Patrick Dupre]

Hello,

Sorry, but in my case, in overprint environment, when I highlight the 
picture for example, I cannot switch to center. This is not an option 
of paragraph setting like it should. I can only unstick/stick the indent
paragraph. That is all!
Why?

===
 Patrick DUPRÉ | | email: pdu...@gmx.com
 Laboratoire de Physico-Chimie de l'Atmosphère | |
 Université du Littoral-Côte d'Opale   | |
 Tel.  (33)-(0)3 28 23 76 12   | | Fax: 03 28 65 82 44
 189A, avenue Maurice Schumann | | 59140 Dunkerque, France
===


> Sent: Sunday, May 17, 2015 at 10:43 PM
> From: "Paul A. Rubin" 
> To: lyx-users@lists.lyx.org
> Subject: Re: Beamer/overprint
>
> Patrick Dupre  gmx.com> writes:
> 
> > > > 
> > > > I cannot have a centered picture in overprint (beamer) environment!
> > > > Is there a tips?
> > > > 
> > > Centered horizontally or centered vertically?
> > > 
> > Horizontally
> 
> Works for me if I surround it with a parbox. I'm attaching a small example
> (using one of the LyX icons as the graphic).
> 
> Paul
> 
> #LyX 2.1 created this file. For more info see http://www.lyx.org/
> \lyxformat 474
> \begin_document
> \begin_header
> \textclass beamer
> \use_default_options true
> \maintain_unincluded_children false
> \language english
> \language_package default
> \inputencoding auto
> \fontencoding global
> \font_roman default
> \font_sans default
> \font_typewriter default
> \font_math auto
> \font_default_family default
> \use_non_tex_fonts false
> \font_sc false
> \font_osf false
> \font_sf_scale 100
> \font_tt_scale 100
> \graphics default
> \default_output_format default
> \output_sync 0
> \bibtex_command default
> \index_command default
> \paperfontsize default
> \spacing single
> \use_hyperref false
> \papersize letterpaper
> \use_geometry true
> \use_package amsmath 1
> \use_package amssymb 1
> \use_package cancel 1
> \use_package esint 1
> \use_package mathdots 1
> \use_package mathtools 1
> \use_package mhchem 1
> \use_package stackrel 1
> \use_package stmaryrd 1
> \use_package undertilde 1
> \cite_engine basic
> \cite_engine_type default
> \biblio_style plain
> \use_bibtopic false
> \use_indices false
> \paperorientation portrait
> \suppress_date false
> \justification true
> \use_refstyle 1
> \index Index
> \shortcut idx
> \color #008000
> \end_index
> \leftmargin 1in
> \topmargin 1in
> \rightmargin 1in
> \bottommargin 1in
> \secnumdepth 3
> \tocdepth 3
> \paragraph_separation skip
> \defskip smallskip
> \quotes_language english
> \papercolumns 1
> \papersides 1
> \paperpagestyle default
> \tracking_changes false
> \output_changes false
> \html_math_output 0
> \html_css_as_file 0
> \html_be_strict false
> \end_header
> 
> \begin_body
> 
> \begin_layout Frame
> \begin_inset Argument 4
> status open
> 
> \begin_layout Plain Layout
> Frame with Graphic Overprint
> \end_layout
> 
> \end_inset
> 
> 
> \begin_inset Argument 3
> status open
> 
> \begin_layout Plain Layout
> <+->
> \end_layout
> 
> \end_inset
> 
> 
> \end_layout
> 
> \begin_deeper
> \begin_layout Itemize
> A
> \end_layout
> 
> \begin_layout Itemize
> B
> \end_layout
> 
> \begin_layout Overprint
> \begin_inset Argument item:1
> status open
> 
> \begin_layout Plain Layout
> 2
> \end_layout
> 
> \end_inset
> 
> 
> \begin_inset Box Frameless
> position "t"
> hor_pos "c"
> has_inner_box 1
> inner_pos "t"
> use_parbox 1
> use_makebox 0
> width "100col%"
> special "none"
> height "1in"
> height_special "totalheight"
> status open
> 
> \begin_layout Plain Layout
> \noindent
> \align center
> \begin_inset Graphics
>   filename /usr/share/lyx/images/unknown.png
> 
> \end_inset
> 
> 
> \end_layout
> 
> \end_inset
> 
> 
> \end_layout
> 
> \begin_layout Itemize
> C
> \end_layout
> 
> \end_deeper
> \end_body
> \end_document
> 
>

Re: Beamer/overprint

[Paul A . Rubin]

Patrick Dupre  gmx.com> writes:

> 
> Sorry, but in my case, in overprint environment, when I highlight the 
> picture for example, I cannot switch to center. This is not an option 
> of paragraph setting like it should. I can only unstick/stick the indent
> paragraph. That is all!
> Why?

I cannot answer "why", but for me this is how it works:

1. Insert the overprint environment (and set the option to indicate on which
slides it should display).

2. In the overprint environment, insert a frameless box. (I switched it to a
parbox, but it's possible a minipage would work as well.) Leave the width at
100%, which is believe is the default setting.

3. Click inside the box and use the paragraph settings menu to set it to center.

4. Insert the graphic.

So centering is handled by the paragraph, not by a setting for the image.
Also, to be clear, I am not inserting an image float, just the image itself.