It is necessary to provide for the allocation of empty space on all slides.

I need to make several presentations in the same style, which will be used as a background for the lecturer. The lecturer will be located in the lower right corner, which means that a certain space on ALL slides must always remain empty.

It is necessary to provide that the empty space can be different on different slides in any corner, or the same throughout the presentation. Moreover, the size of the empty space also needs to be changed in the settings - from 1/10 to 1/2 of the screen size.