If this has been setup on your site you can access the galleries directly from the front end of your website.

After signing into your site, go to a existing gallery.

To work with pictures that have already been uploaded to the gallery, click on the icon located just below the image, Options in clude delete, publish/unpublish, Authorise/de-authorise.

To add additional pictures to your gallery simple move to the bottom of the screen.

at the bottom of the screen is a section for uploading files additional files to that gallery.