I know somebody that has a Chromebook and they aren't remotely computer literate.  They use a gmail account and would like to email pictures from their camera to people.

The SD slot on the Chromebook shows the pictures but the camera makes very large pictures, too large to email with a 1.3mb connection.  

On Windows you can choose to resize a picture prior to sending and even make it automatic.  

I can't find a way to do that in gmail.  

It has to be extremely easy for them or it's not going to be done.  Is there some hidden way to resize an image for sending in gmail on a Chromebook that's basically invisible to the user?

More than 3 clicks to accomplish this is probably beyond their ability.