On RTL languages cursor will move in a direction of the arrow keys regardless of the current RTL text part (visually), else it will move in logical order (the order in which text is typed)
When enabled auto numbering of the subtitles will be performed, keeping their indexes always in order, else subindexes will be produced on edit keeping all existing indexes unchanged.
Text Attributes to End of Line when no text selected
When checked setting text attributes with no text selection will apply them to the end of the line, else attributes will be applied to the next inserted text at the same position.
If loading subtitle file that do not match media framerate or vice versa, display a warning dialog allowing to change the framerate of the current subtitle file.