On 4/11/2016 8:13 PM, Jan Tosovsky wrote:
On 2016-04-10 Hans Hagen wrote:
On 4/10/2016 11:26 PM, Pablo Rodriguez wrote:
On 04/10/2016 11:00 PM, Jan Tosovsky wrote:
On 2016-04-10 Hans Hagen wrote:
On 4/9/2016 11:22 PM, Jan Tosovsky wrote:

since LuaTeXt 0.81 my back-of-the-book index (register) is
with generated strange background colors. The index title
is typeset in yellowish background and the left column of
the last index page has a blue background, see the attachment.

... It was fine in the version 0.80.

no example

here you have the minimal sample:

    \showgrid
    \starttext
    a\index{b}
    \completeindex
    \stoptext

Comment the first line and colors background colors will disappear.

a good catch, Pablo, thanks.

indeed, it's tracing related (no bug)

My idea is to have a single PDF source to showcase some ConTeXt features, where 
displaying the grid is handy, yet allow disabling the grid on demand.

So any visible \showgrid related issues, which cannot be switched off together 
with the grid layer, are unacceptable ;-)

well, with tracing one gets what's provided .. after all it's tracing, so 'unacceptable' is a kind of unacceptable demand

Is there any chance to improve this a bit?

currently not but you can influence the grid a bit:

  \showgrid[reset,...]

options can be seen with

  context --extra=setups grid

You're lucky that it's only a few lines to add 'columns' options (so in some upcoming beta you have to mess with 'reset' and whatever else).

Hans

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