Images over this size (in bytes) won't be thumbnailed. The purpose of this setting is to avoid thumbnailing large images that may take a long time to load or use lots of memory.
If true, files in new windows will be sorted in reverse order. ie, if sorted by name, then instead of sorting the files from "a" to "z", they will be sorted from "z" to "a"; if sorted by size, instead of being incrementally they will be sorted decrementally.
When a folder is visited this viewer is used unless you have selected another view for that particular folder. Possible values are "list-view", and "icon-view".