Centre line

Also called: C/L · Center line

An imaginary line from the front of the stage to the back that splits it into two equal halves. Paired with the plaster line for measuring.

DesignersCrewStage managers

Plaster lineAn imaginary line across the stage at the back edge of the proscenium arch. Designers measure the whole set from it.
Ground planA to-scale drawing of the set seen from directly above. Everyone plans blocking, lights and traffic from it.
Centre stageThe middle of the playing space, both side to side and front to back. The strongest, most visible position on most stages.

More in The stage

Stage left Stage right Upstage Downstage Apron Proscenium