I highly recommend ScreenFloat for screenshots, it's one of my favourite and most used apps - endless power user features that mostly sit elegantly out of the way until you need them. https://eternalstorms.at/ScreenFloat/

This is great, thank you!

thank you, drcongo, I really appreciate your shout-out : ) So happy you like my app! Cheers, – Matthias

Thank you sir. It's indispensable.