Can I edit my photos direct in Smugmug without having first to edit them and then uploading them again?
You may use our built-in photo editor to do some basic cropping, rotating or applying of color effects.
Another option would be to use Adobe Lightroom with the SmugMug publish service. That would allow you to publish photos straight from Lightroom and if you do any edits on them in Lightroom, you could easily republish them to have the edits shown on your SmugMug gallery.
You can also edit photos directly on SM via the iOS or Android apps. Open the photo in the lightbox and then tap the 3 dots and choose "Edit Photo" (not to be confused with "Edit Photo Details")