Hi:
CentOS 7 (latest updates)
GNOME (gnome-classic) version 3.82.2

Occasionally I get a program with a screen that extends into (shall I say "under") my system tray. It doesn't know it's there so there is no scroll bar. Most recently, in LibreOffice I was adding a "footer" to a document, and inserting a field into it, and the final thing I had to click was inaccessible.

When Windows has this problem, I can change the System Tray to 'disappear' (a feature I normally find annoying), what I need is exposed, I do what I must, change the System Tray back to stop disappearing, and life goes on.

There seems to NOT be this option for my gnome desktop.
My research has revealed nothing for me.
This problem comes up occasionally with other programs over the years, I just finally decided to reach out to y'all.

Is there a work-around (if not a solution)?
Thanks.

TBH, I never tried it, but there's Hide Top Bar GNOME Shell Extension

I need the bottom bar, not top bar, to go into hiding, but we'll give this a try.

I did the install, it seems to work adequately, that is, the top bar now disappears when one does the right thing.

So now, I'll wait and wait for the problem (that only rarely occurs), and when what I want is below/behind the system tray, perhaps I can move everything up (disappearing the top bar) to reveal what I want on the bottom.

Here's to hoping this will be an answer, and so, shruggy, thank you very much (in anticipation);
I'll to keep this open until this answer proves either way.

In case anyone else tries this solution, in my own case, I generally don't want to top bar gone, as it has interesting information for me, such as date and time.
The way this extension works, it's generally gone most of the time.

If you're a bit picky like me, after you get it all working (for me, and perhaps for you):

Centos Gnome:

Applications | Accessories | Tweaks

(Tweaks): Extensions | HideTopBar

there is an on/off switch.

I set this off, my desktop once again functions as it had previously.

Now when I get that "hiding part of the window under the System Tray" problem,
I can go back to tweaks to turn it on, and hope it'll resolve my situation well.

Thanks again, shruggy

Judging from the screenshot in the link I provided above, you can set up HideTopBar to be toggled by keyboard shortcut. And there's also an "Intellihide" setting so that the panel only hides when a window takes the space.

Yes, the autohide is supposed to work, I haven't been able to do that as yet, might have something to do with running CentOS/7 KVM, of the VMs I run within that, the CentOS/7 VM is where I live most of the time, so maybe it's a tracking problem -- or, I'm misunderstanding something and will "get it" later.

Intellihide is installed and set.

Yes I can give my own short-cut key (I picked ^K) and that does momentarily show the top bar.

But I like to be reminded how late I am, how little time I have left before ..., with a quick glance in the upper-right for date & time. <.grin>
The self-assigned control key is very helpful while I've enable [hideTopBar] for whatever reason.

But more to the point, my problem came up yesterday, some kind of a "townhall" on FB and I couldn't comment because that was hidden beneath my system tray at the bottom.

I enabled the [hideTopBar] feature, the resulting shifting of all things UP revealed my "enter comment here" box and I was able to participate.

THAT being my real problem, is solved thanks to your diligence and advice.
Thanks again, I'll mark this solved.