Usually on a separate line from dialogue, often in italics or parentheses to show that they are not to be spoken by the actor. In fact, you will usually find all three.
usually in bold or italics
Stage directions are usually on a script in brackets or italic next to the person who needs to perform them
Often stage directions are either italicized or in parentheses
::stage directions::
Script
usually in bold or italics
Stage directions are usually on a script in brackets or italic next to the person who needs to perform them
These are provided in the script for the play or other performance.
Often stage directions are either italicized or in parentheses
stage directions
::stage directions::
Script
script
the script
Besides dialogue stage directions are also included in a script?
Stage directions. Such as [Enter Hamlet] Or dialogue revealing what they are doing/did.
The Stage Directions.