The technician(s) or sound and board ops who are to take the cue are expected to respond so that the stage manager knows they have heard and understood them.
A typical response could be, "Standing by", "Thank you, Sound", "Standby Rail," or simply "Lights."
Sometimes, in amateur or British theaters, a single warning or standby cue is consistently given about 30 seconds before the 'Go.'
If an extra cue is added after the initial list is set, it may be divided by a decimal or a letter.
Many show control systems are also easily capable of this sort of simultaneous cueing ability.
This is generally because the timing of actors' entrances and exits and other movements may vary from night to night, and because calling every followspot cue could become too complicated and interfere with the calling and execution of other cues.
Depending upon the protocol used, a solid red light may indicate that the standby has been acknowledged, or that no cue is pending.
A cue sheet is a form usually generated by the deputy stage manager or design department head that indicates information about the cue including execution, timing, sequence, intensity (for lights), and volume (for sound).
The board operators, running and deck crews may have copies of the cue sheet with just the information dealing with their department.
The stage manager keeps a master list of all the cues in the show and keeps track of them in the prompt book.