The Lighting Controller

What is the purpose of the red and yellow markers in the Timeline?

Red marker
Only for using with button "Play from red marker".

Yellow marker
Gives the possibility to add stamps on the fly, when playing the show. For instance:
- the timeline has only the music file
- you run the timeline (so you listen the music)
- while the music is playing, you add yellow markers in important positions (using ctrl + m keys)
- when the music is over, you can easily recover the important positions and add the light scenes there