Photo Editor

Click the "Browse" button and select the photo from your computer that you want to resize then highlight it with your mouse, then click open and that'll load the photo into the photo editor.
Below the "select file" box there are 4 different editing options. Choose whichever editing option is right for your particular photo that you're wanting to resize or edit then click "Okay"
select file:
portrait: [360x480] [450x600] [540x720]
landscape: [480x360] [600x450] [720x540]
percent: 75% 50% 25%
rotate? <- select for yes 90 left 90 right 180 (flip)

After you've resized the photo, then click on the photo to download it to your computer.

Rename the photo if you want as it'll be some random name when you're about to save it to your hard drive.

Once you've downloaded it to your computer you can then go back to post on or just close this window and attach your newly resized photo to your post.