the cursor anywhere on the screen, even where no text is present (however, you cannot move inside the space expansion of a TAB character).
If you call this command with no arguments, it will toggle the flag. If you
specify 0 or 1, the flag will be set to false or true, respectively. A lower
f' will appear on the status bar if the flag is true.
The issue free-form-versus-non-free-form is a major religious war which is engaging hackers, lusers and programmers from day one. The due of the implementor is to allow both choices, and to set as default the correct one (in his humble opinion). In this case, non-free-form.