When a picture is inserted in a note, does it become part of the notebook?

In other words, when I delete/move te "source" picture from my computer, will it still be part of, and visible, in the note?

I'm currently evaluating MyInfo, so not yet a formal user.
I was searching for an easy way to insert special charactars like diameter Ø, arrows →, etc.
I didn't found an "insert" kind of easy way (like insert symbol in Word).
Is there someting like that in MyInfo, or do I have to "Alt-code" the ...