Your portfolio presentation will be your first opportunity to make an impression. There needs to be a fine balance between presenting your best work and overwhelming the viewer. Pick only your finest examples and provide a good cross-section of work. Most often portfolios are presented in some type of notebook presentation.
Boards are cumbersome and are difficult to transport, but supplying technical drawings is a plus.
It is important for a prospective employer to understand your abilities, which originals often convey better than photographs. Other techniques include fewer photographs, which are enlarged and mounted for stiffness, so that each one is pulled out of a special portfolio case and individually viewed, rather than flipping through pages. This adds to their importance. PowerPoint Presentations are possible, but the equipment to display these types of presentations is not readily available and expensive to rent. Presenting your work on a laptop is a viable possibility.