Answer:.
- With blank presentations, a user starts from scratch; with themed presentations, some design elements are built- in .
Step-by-step explanation:
Blank presentations are used to start a presentation from a white canvas, without preconditioned layouts, templates, or layouts. From then on we can include objects and texts to the blank presentation.
Blank presentations are usually used when the person generating the presentation knows how to use the program well and also when none of the built-in templates adapt to our needs.