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3h
comment Conditional test inside command parameter
I would, but I'm not allowed to upvote my own answer.
3h
comment Conditional test inside command parameter
the question does ask to avoid repeating \includegraphics :-)
3h
comment Conditional test inside command parameter
the point is you shouldn't post examples that generate errors (unless asking about the error) it just makes it harder for people to help.
5h
comment suppress output <use image.png> [n] for \includegraphics{image.png} via pdflatex
@GeorgesDupéron it comes from pdftex itself, not from a macro package
12h
comment Tabularx and decimal alignment with dcolumn
as I said that should be a non aim, it just makes the table harder to read, I'd just fix the heading in the first column to be 2-line say \begin{tabular}{@{}l@{}}Dependent Variable:\\$R_{i,t+1} - R_{f,t+1}$\end{tabular} so the first col isn't so wide, and call it done.
12h
comment Tabularx and decimal alignment with dcolumn
as here the table is 21.4pt too wide, there are various ways to adjust that depending on the actual page size in your real example.
12h
comment How to make equation array look more neat and compact
mainly I would remove all the \displaystyle they are forcing the line spacing to be uneven and that is a large part of the reason why the display looks unbalanced.
12h
comment Tabularx and decimal alignment with dcolumn
the Nobs row is aligned in the third column but not in the first two as you have removed the d alignment with \multicolumn{1}{c}{8981} (it may be that is the best thing to do as the integer is unrelated to the real numbers above so alignment doesn't really help)
13h
comment Tabularx and decimal alignment with dcolumn
you can't use tabularx without an X column, it has no way to stretch the table. Just use tabular (forcing the columns apart should be a non-aim anyway)
16h
comment longtable overwrites page number
texdoc longtable page 9: \pagebreak or \newpage force a page break.
16h
comment Warning “No positions in optional float specifier.”
@UlrikeFischer sigh. I guess I was the last person to edit the code that calls that as well, so I might have known:-)
16h
comment Warning “No positions in optional float specifier.”
It is always possible to post a small complete document that generates the warning, just start with a copy of the existing document and delete everything that doesn't make the warning go away and post the resulting document in an edit to the question.
1d
comment longtable overwrites page number
(the english grammar was correct before the edit)
1d
comment longtable overwrites page number
@Zarko no. \centering has no effect on longtable
1d
comment uneven space between words
that is not the default behaviour. You must be using some package to increase the line spacing in normal text but revert it to normal in lists. If you don't say which code you are using to do that it is hard to say what to change.
1d
comment Numbering shows on the first page of every chapter and skips any other pages!
\pagestyle{empty} affects the whole document if you just want to affect one page you should use \thispagestyle{empty}
1d
comment longtable overwrites page number
I can see nothing wrong with the output here the longtable doesn't go beyond the text block into the footer at all. However you should remove the center environment which can not do anything useful for longtable and just adds spurious vertical space.
2d
comment Impossible compile in Sharelatex in normal mode
grep suggests that the command is defined in lineno.sty have you removed that package?
2d
comment System-wide default font, change from CM or LM?
you say you are using opentype fonts but that implies using luatex or xelatex (and fontspec) which is a rather different question than the one you ask about the default fonts (for a latex/pdflatex document)
2d
comment How to align table so that it doesn't overflow the page horizontally
l (not (1) and c are single line entries: perhaps you want p{3cm} to allow line breaking but you ask how to make the table fit without giving any indication of the size that it needs to fit into. Please always post a complete small docuemnt that demonstrates the problem.