gallery - Change image size before sharing an image via email

When I first used the share functionality (Share via email) from the gallery, Android asked me what should be the size of the images (fullsize / normal / small) that will be shared. I opted for regular then, and now I want to change this setting.

I cannot seem to find this setting option anywhere, anyone knows where I can change this ?

(Note: The "crop" feature in the gallery).

Answer

I went against the original clause in my question and used Image Shrink Lite.