When this option is turned on, as soon as mrViewer loads all the files, it will try to start playing them.
As other defaults, you can change the default speed (FPS) of the timeline as well as its looping mode. The FPS of the timeline only takes effect on sequences, not videos which already have an encoded FPS.
This section allows you to toggle how the timeline displays the time. It can be in frames, seconds, time, Drop Timecode, Non-Drop Timecode.