Galleries are used to organize your projects by categories. You may have as many or as few Galleries as you'd like. Each Gallery will contain navigation links to that gallery's projects.
To add a new Gallery to your Portfolio, roll over to the left side of your screen and go to Manage Content . From there click on '+' icon and click 'Gallery'. You will be asked to name your new Gallery; You will then be able to add content to your new Gallery.