feature suggestion

Hello! Thanks for the great work.

I would like to suggest if it is possible to add an option for the image like
eg. Exempt from image watermark.
Reason behind:
Because I use the media replace plugin which can upload and replace, eg a logo.
A logo does not need to be watermarked in this case.
Other usages like background images graphics, patterns also need to be updated from time to time during development and does not need to be watermarked.
So I think it would be nice to add that option in the individual image.

Many thanks.