Thanks John (and all) ...

Now the display of different backgrounds on different
desktops (which had stopped working) has mysteriously,
and spontaneously started working again, even though
I made no changes.

And Libre office, which was knot working, has started
working again, again, even though I made no changes.

But now Libre office will print .odt documents with
plain text in portrait mode, but it will not print
an .odt document in landscape with an image in the
document.

PS: I have Mint 17.2 Mate with Brother printer HL2270DW

-------------
On 2021-03-14 8:26 pm, John Seberg via PLUG-discuss wrote:
> It shouldn't be too hard to figure out how to change
> the background image of your desktop.
> 
> Let us know which version of Mint you're currently running:

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