A theatrical cue is the for an action to be carried out at a specific time. It is generally associated with theatre and the film industry. They can be necessary for a lighting change or effect, a sound effect, or some sort of stage or set movement/change.
Cues are generally given by the stage manager as a verbal signal over the headset system or backstage intercom, by a signal with a 'cue light' or by a show control system. There are 3 types of cues given. Warning, Standby, and Go.
There are several common methods for the stage manager to call warning, standby and go and each stage manager has their own method. The important thing is that they can be heard and understood. Here is an example of a way a stage manager might call for Light Cue #24
The words 'warning' and 'standby' both come before the department and cue number, but the word 'go' comes after. This is because as soon as the word 'go' is heard the crew will execute the cue. It is important that no crew member use the word 'go' in any way while speaking into the intercom system, including casual use of the word 'go' by the stage manager. When discussing cues, many stage managers and crew members will substitute the phrase "the G word" or "G-O"for the word 'go'.
If there are multiple cues right in a row, rather than calling warnings, standbys and go's, a stage manager might say: "Warning Lights 26 through 30, Standby Lights 26 through 30, Lights 26 Go, Lights 27 Go, Lights 28 Go, Lights 29 Go, Lights 30 Go."
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."
Many types of cues are not apparent to the stage manager, or are subtle. In this case the technician who executed the cue usually responds with a taken note; e.g. "Rail cue 11 taken."
The stage manager may ask for the operator to say when the cue is completed. For this, it will be said:
Sometime either the warning or the standby is omitted. This is common if, for example a number of cues are close to each other and don't require preparation. Sometimes, in amateur or British theaters, a single warning or standby cue is consistently given about 30 seconds before the 'Go.'