How do you show window opening direction on a plan?

To indicate the window opening direction on a plan, use a simple arrow drawn from the center of the window symbol towards the direction it opens. The arrow should be placed outside the window outline to clearly illustrate the swing direction. Additionally, label the window with a notation, such as "in" for inward opening or "out" for outward opening, to provide further clarity. This method ensures that anyone reviewing the plan understands how the Windows function.