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Stan,

When I re-uploaded it again, it would not display in SeaMonkey. I now
have to go to FireFox to see it as well as all the images I uploaded
for the subgroups I created. What did I do that caused it not to
display in SeaMonkey?

I've never used SeaMonkey, so I really don't have a clue, but could the page simply need to be refreshed?

Or might you have somehow blocked SeaMonkey from loading images from AWS (Amazon Web Services) - the "cloud" service Groups.io uses for photo and file storage? The cover image on GMF comes from an address that begins:
...
So you would want to check that servers in the domain amazonaws.com aren't blocked.

Diagnostic question: in SeaMonkey do you see GMF's cover photo, or that of any other Groups.io group? If not, you've probably blocked AWS.

As an aside, how can I make a cover image the same size as the
Elephants image?

Use a photo editing tool to crop it to a 3:1 aspect ratio, and make sure it is saved at 900 x 300 resolution or larger.

Also, when I was exploring what all the options were for the uploaded
cover image (by right clicking on the mouse) one of the options I
clicked on wiped out the customized Windows background color.

Oops.

As far as I know Groups.io never overrides the right-mouse menu, so whatever menu you saw there was provided by SeaMonkey or your operating system. So nearly anything's possible at that point. Best to keep the finger-guards on when playing with power tools.

That menu may well have provided the means to block images from Amazon...

Shal
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