Glad to see there is now an option to rename photos in Collector. This is very handy for making the photo naming more descriptive. However, there are many steps to go into photo renaming: tap on a feature, go into edit mode, download the photo, tap the photo and tap to rename, type the new name, tap done, update, etc. etc. I count 11 taps to rename one photo!
It would be nice to have a rename feature directly available from the attachments section of the feature. This would likely reduce by more than half the number of steps it takes to rename a photo. It would also be great to have a rename function available form AGOL/Portal and from the desktop attachment manager.
