I want to use LaTeX for typesetting astrology charts, and won't need to use any margin notes. What's the best way to disable margin notes so I can have the space for wheel charts?
You can easily set the margins to a constant amount using the geometry package, e.g.:
See the documentation for more info.
Or without a package:
\marginparwidth 0pt \marginparsep 0pt \oddsidemargin \dimexpr .5in -1in \textwidth \dimexpr \pdfpagewidth -2\oddsidemargin -2in
Remove margin notes
Set left margin to .5in
This step is tricky because oddsidemargin is not the length from the left edge, but the length from 1 inch from the left edge. So when you set it you have to subtract that inch.
Increase body width
Again, normally the body would be
pagewidth - 2 * margin, but we need to account for the inch offset on both sides.