Though there are many variations on the design of a stage, the principle is the same. Set peices can be drawn in and stage directions written in as well. Circles usually represent chairs, boxes for tables or couches, but everyone should be creative. During rehersal time, stage managers are not only expected to take stage notes, but also to keep actor's in line. They are to cordinate with the director and call rehersals.
Stage managers are in charge of every aspect of the production.
In the absence of the director, stage manangers are expected to direct according to stage notes. Stage managers must also organize department meetings. In small theatres, the stage manager may be expected to fill some of these roles as well. All these departments must be organized and kept informed of each other's needs. A propertoes mistress may have just what the custumer needs, and likewise perhaps the publicity manager needs a prop for a phot shoot.