How to vote
Vote by clicking the thumbs-up icon in the toolbar.
How to submit
Click the settings icon ("cog") in the toolbar while viewing your photo and click "Submit to weekly theme".
Next week's theme
The theme for next week is High key.
Every week a new theme is posted and you can upload one image. The image must fit the specific theme or it will be removed. Members will vote and the photo with the highest score wins.