If these are recurring notes, you can make a template out of them and have it in the design library. I think a simple Ctrl+ Drag the note into the library is enough.
@Benoit.LF - the grades are not of the same nature
@opiep27 - When there is a certain density of entities, these lines of attachment are painful; It's better to turn them off. But with each note, it's a little time wasted each time.
@flegendre - Yes, I know. But what I wanted to know is how to make notes that by default have NO attachment lines and conversely, put them if necessary.
Not sure if there is a solution, I wait a little to close the question
While waiting for enhancement requests, you can select all annotations by activating the note selection filter and thus remove the attachment in one go.