Find dialog

Applied the latest update.

I see RFE77454 but I do not know what "like eclipse" means since I do not
use eclipse.

Used to be when I selected some text and pressed ctrl-f, I could check the
"restrict search to selection" box to limit the subsequent "replace all" to
that area. Now, the box is greyed out.

The find dialog seems to change with every update. Can someone explain
what "selection" means now and how I can effectively select text so that I
can use that checkbox? I can find no description of the settings for
selecting text like "block" "stream" etc in the help, only that I should
select one or the other.

I did some more experimenting and found that if I select some text ON ONE
LINE only and not including the EOL, the checkbox is available (but really
less than useful in that context). Selecting more than one line of text
makes the checkbox unavailable.

Using ALT-R to select a rectangle of text (of any size) enables the
checkbox and forces the checkbox to be checked. It is uncheckable. The
selected rectangle is persistent in this case.

I spose I could do all my selections with ALT-R but it's a pain to remember
to ALT-U every time.

Stu