Rectangle copy/paste and pick tiles for drawing in map mode
0.7.0
Basic map editor functionality; select character with which to draw, then draw freehand, lines, squares, etc.
0.6.0
Now disassembles in the background so any edits are processed much since it's not disassembling the entire file at once.
0.5.3
OK, this is about as fast as I can get the display to update without resorting to major trickery and/or writing display code from scratch with is, honestly, unlikely. Hopefully all the refreshing issues are fixed with selection also.
0.5.2
Fixed the highlighting issues; mildly faster as well, but still hopefully bigger speedups ahead.