Affinity prizes

Your chance to enter the UK’s most prestigious com petition for amateur photographers Round three

Image editing plug-ins to broaden your photographic horizons

Get to grips with the powerful toolset on Mac

Manage your ever–growing photo collection and edit pictures to perfection

Here are the top ten images uploaded to Photocrowd from Round One, Black & White, with comments by the AP team and our guest judges

1 Use this button to toggle between regular thumbnails of your photos, as seen here, and square-shaped images that leave little border. 2 This slider increases and decreases the size of your preview i