Just a few off my quicknote clipboard:
In addition to QSELECT and FILTER, use the FIND command to edit repetitive text like circuit references, when someone decides to change a distribution board reference in a large office floor plan...
FIND also works on attributes definitions iirc.
Also,
GRIP EDITING - copy, rotate, scale, move, mirror etc etc add and remove vertices by cycling CTRL when a grip is hot.
ATTSYNC - update attributes in existing blocks.
IMAGEFRAME - sysvar - plot/no plot boarder around inserted images.
CTRL+SHIFT+U - with highlighted text forces upper or lower caste.
CTRL+SHIFT+L
TAB - to cycle through active osnaps when drawing.
PKFSTGROUP - group manager, soooo useful. Use CTRL+H to toggle group selection
In single line text use
%%d - degrees symbol
%%u - underline text (end text with %%u to stop underline)
%%c - diameter symbol
%%p - plus/minus symbol
editing dimension text via properties dialog text override (or double click and use text editor):
\X will drop the remaining text below the dimension line.
\P will create a paragraph line break. You can use more than one \P as needed
