Your Main Client is able to hide photos from their gallery. You can choose to delete the hidden photos if you desire. The process can be done by filtering the hidden photos and selecting all to delete.

1. In the Photos tab of the gallery, choose the filter button in the top right, and filter the photos to only show the Client Hidden.

2. Select at least one photo and then click Select All.

3. Click Delete and confirm that you would like to delete the photos.