> I do not seem to be able to find means to cause a single
> overscore bar to span more than one character. For
> instance, I would like to represent the regular expression
> 1(01)* in the form reminiscent of the mathematical mark
> of repetition. When I use 1\bar{01} the mark has width of
> one character, and spans the space between zero and
> one, not the space from outer edges of both characters.
A good LaTeX resource is helpful for a serious LyX user. For an under-bar,
use \underline in math mode. \overline gives an over-bar.
>
> It is possible for me to select a stretch of text, and to
> assign some kind of special character, such as italic,
> bold, etc. Why can I not also add the character of
> underline, overscore, strike-through?
See the "ab" button or "Edit->Text Style"
> It is not always clear from the user interface when I should
> use ERT, insert math directly, use TeX commands, and
> the like. Experience will likely ease this uncertainty but,
> I wonder about finding means to ease the utility of TeX and
> LaTeX knowledge, such as to zero. Some things are
> already handled in this fashion, like emboldening text, or
> centering it. My suspicion is that many more such knobs
> can be added. The one knob of ERT, as desirable as it
> may be to forever retain it, should be a mechanism of last
> resort; is this not a goal of the team, that ERT be a last
> resort?
ERT is the nuclear option. Use LyX constructs where possible for more
readable documents. LyX's math mode is particularly nice, and supports most
any LaTeX math construct.
Also, see Document->Settings "Latex Preamble" for a spot where you can
include more LaTeX packages...
James