Step 1: Go through the projects you’re already working on and change a bunch of the characters’ first names to women’s names. With one stroke you’ve created some colorful unstereotypical female characters that might turn out to be even more interesting now that they’ve had a gender switch. What if the plumber or pilot or construction foreman is a woman? What if the taxi driver or the scheming politician is a woman? What if both police officers that arrive on the scene are women — and it’s not a big deal?
Step 2: When describing a crowd scene, write in the script, “A crowd gathers, which is half female.” That may seem weird, but I promise you, somehow or other on the set that day the crowd will turn out to be 17 percent female otherwise. Maybe first ADs think women don’t gather, I don’t know.
And there you have it. You have just quickly and easily boosted the female presence in your project without changing a line of dialogue.