There are ways around that, e.g: number the slides like 1/7, 2/7, 3/7 so people roughly know where we are in the presentation, even better if you can time it, e

There are ways around that, e.g: number the slides like 1/7, 2/7, 3/7 so people roughly know where we are in the presentation, even better if you can time it, e.g: 1'/20, 3'/20, 7'20.