How to reduce the size of ten-megapixel photos and send them by e-mail in five mouse clicks ...

As you know, mailers have a limit on the maximum letter size.
How to reduce the size of ten-megapixel photos and send them by e-mail with a minimum of movements? (MS Windows)
I still wonder that not all MS Windows users know this method.



PS: users of other OS, please tell about the similar function in the comments.