Please add this feature.
Thanks.

Layers would help me. I want to write consultation notes and sometimes need to print them. If I could just print the "new layer" on the previous printed paper copy I wouldn't have to print out the whole page with each new addition, just feed the old one into the printer and print the new layer as an addition.

This is important. Either that, or being able to select some portion of what's written/drawn and "locking" it, so that you can write over it and erase without affecting the locked portion.

This feature would allow more precise edited without messing up previous work. If file size is a issue add a flatten layers feature.
Cool app by the way

I would be really happy with the possibility to use layers. For example Zoomnotes has already offer it...

Layers would make the app more useful

I use goodnotes exclusively when I am designing buildings and putting objects on layers would be such a useful feature

I use goodnotes for sketching and layers would enhance the product a great deal

Add a lock text/drawing feature so that you can selectively not erase it (i.e. Lock it, write over it and be able to erase only what you wrote over it.)

I am a teacher and give live presentations multiple times, and reuse year after year. Transparencies would be amazingly great. Now I have to go back with my eraser and carefully erase changes to each page between class periods. Not simple, fast or efficient.

I use this app for my sketching my architectural designs and the ability to work in layers would be so helpful. Rotating hand drawn notes/sketches would also very nice. If these features are too specialize for most people Goodnotes may want to consider selling these features as an optional add-on. This is by far my favorite app.

Yes and the ability to order them like "send to back" and "bring on top"

As well as scaling and rotating the layer...