wdired-allow-to-change-permissions

wdired-allow-to-change-permissions is a variable defined in `wdired.el'.
Its value is

nil

Documentation:
If non-nil, the permissions bits of the files are editable.

If t, to change a single bit, put the cursor over it and press the
space bar, or left click over it. You can also hit the letter you want
to set: if this value is allowed, the character in the buffer will be
changed. Anyway, the point is advanced one position, so, for example,
you can keep the key pressed to give execution permissions to
everybody to that file.

If `advanced', the bits are freely editable. You can use
`string-rectangle', `query-replace', etc. You can put any value (even
newlines), but if you want your changes to be useful, you better put a
intelligible value.

Anyway, the real change of the permissions is done by the external
program `dired-chmod-program', which must exist.

You can customize this variable.