Do you keep the door open during your presentation? Maybe better not having an open door to avoid distraction of people walking in an out during your presentation. Also having a an open door makes the sound escape from the room, meaning you need to talk louder.
Think also about the temperature control in the room, will it be difficult to control with an open door? Do you get a draft? A closed door may create a more intimate setting for your presentation.
Also when you close the door before your presentation you may opt to close the door a bit faster than needed to create a nice “bang” to mark that you will almost start your presentation.
