Step 5: Once you have clicked OK the image will resize but you will notice the file size still says its original size (2.6MB in this case). Now here is where you may have to play around with the image. The image info (file size) will not change until it is saved. Here is where you will go to File, Save as (this is important as you do not want to overwrite your original photo just in case you do not like the changes), and select JPEG picture. Rename the file and continue. Once you have saved the new file now you will see the file size on the bottom of the screen has changed (in this case 112.2KB)