This page contains various options that let you adjust the behavior of File Displays.
If the file with focus had been scrolled out of view before the change, it will be ignored and focus will reset to the top visible item. As an example, if you scroll to the top of the file display, click the 5th item down, then sort by date: If the option is on, you will still be at the top of the file display, and focus will be on whatever is the new 5th item down. If the option is off, focus will be on the same file as before and the file display will scroll to ensure it is still visible.