Other settings

Threads:

Runs directory scanning and thumbnail generation (only for Jimp) in a different thread
Number of threads that are used to generate thumbnails. If auto, number of CPU cores -1 threads will be used.

Misc:

Those thumbnails get higher priority that are visible on the screen
Shows only the required amount of photos at once. Renders more if page bottom is reached
Caches directory contents and search results for better performance

Navigation bar:

Show the number of items (photos) in the folder