You can easily take photos of your designs using the camera tool, found in the extra tools drawer at the top of the main menu. Select the camera tool from the menu and then use the trigger on your controller to take a photo. Photos are automatically saved under Documents\Arkio\Export\Photos.
Tip: To easily take photos of your design in progress you can try to select the camera tool with your left hand while modeling with your right hand. All tools in Arkio can be used with either hand.