Replacing in selection is a crazy difficult process - and it apparently does not even work. Getting to the point of even having Replace in Selection enabled we need to:
- highlight the area
- Hit Find by Alt-Cmd-F
Then we can try to do replace in selection by:
- Hit Alt-Cmd-L
The replacement selections dialog is on the upper right . I have put in 'space' for the find and nothing/empty for the replacement.
How to replace all at one swoop? Hovering for a while gives the nominal answer:
But CMD-Enter does *nothing. Actually ENTER does nothing either. This Find in Selection is inoperative??



There is an additional step I found by trial and error: we need to tab to the Replace field and then hit CMD-ENTER.
This whole process is rather hard to believe about how cumbersome to do for a core/essential editing capbility.