What I did:
I copy screenshot from extend monitor to agenda Note.
As attachment, that image will be smaller width than one from main Monitor.
What I expected:
If I do the same thing on Apple Note, that will be the same width.
Things that might be helpful to know (Agenda version, OS and model, etc):
macOS Mojave 10.14.6
iMac Retina 4K, 21.5-inch