Hi,
I searched and could not find an answer to my question, so I am posting it.

I use Opera Mini. When I go to a site and sign up for something, I
click to enter my email address, and am taken (as I am
sure you all know) to an "enter text" screen to type my email address.
Is there a shortcut that would put my email address there, or do I have to
type it in each time?

Wirelessly posted

You have to enter it everytime, unless the site has a check box for the remember me option

SOLVED-- With autofill. I type in the first 3 letters, click space, and my email address is there. Yea!!

Yup autotext should work for all text fields.