Thanks for replying.
Is it possible that Shift and Super are swapped in Neo?
No. When I press super on its own, the Mint menu opens. When I press Shift, I get capital letters. All regular.
Is it both Shift keys or just one?
Yes, both Shift keys exhibit the same behaviour.
In the picture you posted, it seems you set the keyboard shortcut in the settings for QWERTZ. Maybe that needs to be set for Neo as well?
These settings are global. If I select a different layout and change a setting, it stays the same when I change the layout back.
Pressing Super+Shift was never the question. I’m talking about Shift+Space and Super+Space. They behave the same, regardless of order.