Greetings, iam Marvin Dugat, Have a good day!
How Do I Anchor A Layer In Gimp? [Solved]
You can access this command from the image menubar through Layer → Anchor layer, or by using the keyboard shortcut Ctrl+H.
How to Anchor a Floating selection
s.
GIMP Basics: Intro to Layers and Advanced Layers (GIMP 2.10)
In this live stream, I go over an introduction to
Layer Masks in GIMP
How to use