This feature links the neighboring folders. Note, upper and lower level folders are not linked, only those that reside in the same containing folder.
Link neighboring folders
Turn on/off the feature.
Skip folder levels
When turned on, the next folder can be on a different level - deeper or higher - too.
Use background image
A simple button or the folder's (representing) thumbnail is used as a background image.
Loop folders
With this option on the folders will be linked circularly, i.e. the slideshow will jump to the first folder after finishing with the last, effectively creating an infinite loop.