If you\'re typing a command in Vim (I mean you\'ve started with : and you\'re working in the bar at the bottom of the screen) is there a way to move the cursor
Type
:h cmdline-editing
for details. I am listing a few of the interesting non-arrow commands that do something similar to what you want.
5h.Tap Ctrl+F while in command-line mode (just after :). There you'll get command-line window which could be edited&navigated as a regular vim window (hjkl etc.).
See :h cmdline-window for details.
nnoremap q; q: to facilitate typing. usr_20.txt and cmdline.txt contains all useful infos.
On Mac OS,
To add to Maxim Kim's Answer,
In the Normal Mode ..
q: -> cmdline window for commands
q/ -> cmdline window for search forward
q? -> cmdline window for search backward
Ctrl-C or <CR> will take you out of cmdline-window