@doodles09 It's above the "(Remove) Love it" button. I was doing it based off my view of this pattern, and there isn't a love button on your own patterns apparently. My bad.
@doodles09 Take a photo of it, and at the top of the page on the right, above "Add to-do" it says "Add a photo". It will take you to another page where it will show the pattern and a button that says "Choose File". Click it, and find the photo that matches the pattern on your computer or phone and click on the photo. Then you click "submit" and wait for the mods to approve it.
And if you made a pattern for an OFFICIAL challenge, you put the word "Challenge" on your photo somewhere and you can get one of those numbers in an orange circle on your profile page.