On 500px you have the option of uploading a low resolution photo for display, and then providing a separate high resolution file that will be used for licensing. This provides a high resolution, clean photo to be used for licensing. The high resolution file will be sent to distribution partners for representation and promotion on their platforms. Here's how to do it!
1. Upload the low resolution file just as usual. Click here for instructions on that.
2. Go to 500px.com/store and click the "Choose File" or "Change Image" link next to the photo you'd like to submit for sale.
3. Select the high resolution file, and upload it! You're all set!
Now complete the rest of the submission at 500px.com/manage!