Command/Shift + Click = Show Desktop

If this is third party interferences,

I would question:

DNG Suite (installed 2014-06-04) (?)

[Running] com.backblaze.bzbmenu.plist (Backblaze - installed 2019-12-27)

[Running] ChronoSync Scheduler (Econ Technologies, Inc. - installed 2019-12-18)

[Running] com.bjango.istatmenus.fans.plist (Bjango Pty Ltd - installed 2019-10-07)

[Running] com.bjango.istatmenus.daemon.plist (Bjango Pty Ltd - installed 2019-10-07)

Save to Pocket - App Store (installed 2019-12-04) Safari extension

Start with the 1st one and use the official uninstaller— then see if it makes a difference. Reboot maybe necessary.

One at a time, proceed in an effort to identify the conflict

froggiefingaz wrote:

Anything - or so it seems so far. Here are some examples...

Finder window:

https://discussions.apple.com/content/attachment/bf932ee9-f751-478e-a169-f7f027ed10f7

My desktop (after clicking "Show Desktop" already:

https://discussions.apple.com/content/attachment/90c57ba5-45ab-4a7e-a469-0c8c84ec1712

This thread in Safari:

https://discussions.apple.com/content/attachment/88680c67-cff5-49d5-a19b-4804174a11b6

  To trouble shoot further you can:

  Try a SafeBoot https://support.apple.com/en-us/HT201262

  Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache,  etc.  Login and test. Reboot and test will take a little longer as caches get rebuilt. Reboot as normal and test.

This test will tell you if third party interference; extensions etc are not loaded in safe boot mode. 

  Test issue in another user (or guest user) account  https://support.apple.com/en-us/HT204443

  This will tell you if it a universal issue or isolated to your user/admin account. 

froggiefingaz wrote:

I am wondering why when I either hold command and click or hold shift and click I get a weird box with two options to "show desktop" (see picture). Currently on 10.15.2 MBP 16"

Click what?

If you hold the control key and click the Desktop you should see a contextual menu with Some Desktop preferences.

froggiefingaz wrote:

I think I followed the directions correctly and restarted into safe mode. I didn't have any sort of longer log-in process though. Is that only something that happens on HDDs? If not, I may have missed a step.

What I did find out:

1) it does not do the "show desktop" thing in safe mode

2) it does not do the "show desktop" thing in a guest user account

3) the problem persisted after logging back into the personal account

4) the problem persisted after rebooting normally following safe mode

Thoughts?

Good work— isolated to your user is progress.

To get a good look at your System config. for conflicts or issues, you can run this utility http://etrecheck.com  

If you need help interpreting the report you can post it here in its entirety in the "Additional Text" box in the editing toolbar below, in your reply.

You can set its preference to "Allow full Disk Access",  with this you get a digest of issues from the last 7 days that are saved in your system.

froggiefingaz wrote:

Thanks for the help with this. It turned out to be an accidental custom mapping in Better Touch Tool. Was having issues mapping my mouse and must have been a result of that process.

Good computing froggiefingaz ! Thanks for your report.