thank you for your reply.
I think that our needs are perhaps different.
I don’t want my snapshots in the cloud.
I was looking for a small effective snapshot + basic image annotation app.
Snagit is fine, but a bit too heavy for simple uses
I am looking for a an app to take a snapshot ➜ annotate ➜ copy + paste image into (usually) mail, evernote or Scrivener
I thought about the BTT snapshot app (part of BTT), but you can go crazy trying to understand how to annotate images.
You know so much : perhaps you have an idea?