Thanks to all who have responded, but let me see if I can clarify
and add to what I havve learned.
1. The limiting factor is the menu bar (File, Edit, View . . .)
where there are no icons. What is worse, I have a Spanish interface
which makes some of the items (words only) longer. I have seen no
way to change the size of the font on the bar, nor is it possible
to hide the menu bar, although there is a work around to create a
macro to do so mentioned in LO and OO fora.
2. The Anaphraseus extension is added to the menu bar, not a tool
bar.
3. The problem does affect LO 5.4.3.2 which I have on the computer
from which I am responding. It did not bother me there because I
have yet to add that extension there. However, minimum sizing IS
affected by the space required for the menu bar. (As a
parenthetical comment, when I work quikly, I can resize the window
smaller UNTIL the menu bar loads. I offer this in case someone
wants to test on an affected installation.)
4. This is NOT a problem in the Windows version of 6.0. Sizing the
window smaller simply progressively hides the menu bar.
5. Although LO has always been GTK based in Linux, I am not sure
if it now has a Qt interface to integrate better with KDE/Plasma
which may not be affected, hence my addition of GTK to the subject
line. (Input here welcome!)
6. MOST IMPORTANT: Now that I understand better what is going on,
Tomorrow, I will recheck LO's Bugzilla for existing bugs and if
none is reported, will report this. I will also report the bug
number to this list, in this thread so that others can see and add
to it.
Again, many thanks for the help on this matter.