iam537 wrote:
Previously, I had an old MacBook Pro (2017) with a Logitech MX Master 3 Mouse, taking screenshots was a breeze.
However, I recently upgraded to a Macbook Pro M3, and, I am having a problem with taking a screenshot!
I would open a picture or document on my desktop, I would use the the mouse to take a screenshot. However, it would only take a screenshot of the desktop background!!!
How do I resolve this??
What you do not say is what macOS you were running on the " old MacBook Pro (2017)"
Shift Command 5 make changes to suit your needs
Take screenshots or screen recordings on Mac - Apple Support
(This new setting shortcut command was introduced MacOS Mojave in 2018)

once I have my set my options I use the 'traditional' commands—
Shift Command 3
Shift Command 4
Take a screenshot on your Mac
Take a screenshot on your Mac - Apple Support
if your old third party mouse is not working as expected—
there may be a firmware update for compatibility
if in doubt search the developers website or contact their: Support/Help/FAQ/Known issues/compatibility/updates…
Contact a third-party vendor - Apple Support
Contact a third-party vendor - Apple Support