Anyway, noteable changes:
- The 64x64 floor grid is a lighter blue so it stands out from the rest of the grid.
- Linedef dimensioning is disabled until I figure out why offscreen numbers get misplaced on screen.
- Shift+Ins behaves properly.
- Can now be run from any directory, without having to be in the same directory as the executable. The datafiles and ini/cfg files must still be with the executable, though.
Windows users: If ZETH mysteriously crashes/disapears when selecting linedefs, or if your display corrupts, open allegro.cfg, find the line 'gfx_cardw = ' and set it to DXOV. It's an identified Allegro issue with DirectX accelerated windows which crash, and GDI windows which corrupt, the program.