You should add methods of selecting mass numbers of images after datasets have been created and converting them to train/valid/test - it is very cumbersome to have to go into each image and change its status.
Agree with @25benjaminli
It is often necessary to re-balance the images manually. Doing it one by one is just nausea and a waste of time and nerves… Please, add three functions to the “Images selected” menu: mark TRAIN, VALID and TEST…
It will help the work a lot!