problem in my account verification

My trading account is not verified. I try to send documents but they say file size is too big. How can i reduce the file size?

Simple way to reduce the fille size is with PAINT (Click start then enter word "paint" then enter, open your documents .jpg
and then choose Resize, after that setting the pixels.
Adjust to the terms and conditions applicable.

Thanks for complete process, i was searching on google problems similar to mine. They told me to use print screen button and then paste it in Paint. I did not know that it is possible to set the pixles too. thanks