Custom Gallery Settings
You also have the ability to override your global gallery settings for individual galleries. This allows you to select different gallery styles and info panel options for each Gallery.
By default, a Gallery's style and settings will match the global Gallery style and settings as defined in the Design Editor tab > Galleries panel. Enable this option to override those settings and configure customized Gallery settings for this Gallery only.
This feature allows you to have different Gallery styles for individual Galleries. For example, you can set your global Galleries to be presented as a Grid, but have a Homepage gallery set to Fullscreen Slideshow mode.
To override your global gallery settings for a gallery:
Click the Gallery Settings button at the top of the Gallery.
Enable the "Custom Gallery Settings" box:
Configure the Gallery styles and settings for your custom gallery
click Update to save your changes