On Ubuntu 19.10 I'm experiencing the same thing as the comment above:
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Jan B (hey-e) wrote on 2015-04-08: #143
I have a laptop and a monitor as secondary display
...
Every time I switch back from only using the monitor (laptop display disabled) to using the laptop display as a second screen – I need to rearrange the displays. By default they are side-by-side but I always want the monitor above the laptop display.
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I don't have Ubuntu 20.x installed at the moment to confirm whether it happens there, too.
On Ubuntu 19.10 I'm experiencing the same thing as the comment above:
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Jan B (hey-e) wrote on 2015-04-08: #143
I have a laptop and a monitor as secondary display
...
Every time I switch back from only using the monitor (laptop display disabled) to using the laptop display as a second screen – I need to rearrange the displays. By default they are side-by-side but I always want the monitor above the laptop display.
#######
I don't have Ubuntu 20.x installed at the moment to confirm whether it happens there, too.