vim-fontsize

Change font size incrementally by one-key typing.

Currently only works on Windows and Mac OS X (not tested).

Usage

1. Run :Fontsize to enter the state of changing font size.
2. Press +/= and - to increase and decrease the font size respectively, by 0.5 in height, if width is not the only dimension found in the 'guifont' setting, or width every time.
3. Press <Esc> to quit the state.

It works by changing option guifont. Refer to :help 'guifont' to find if your system uses this option.