Give users the ability to choose a presentation size
You really need to give users the ability to choose a presentation size. The reason this is is that you need to give user the ultimate freedom with their designs and right now you box them into your own grid which constrains my ability to design.
7
votes

A new setting has been added for this. You can now select from multiple different sizes or specify a custom size in the presentation settings.
Learn more at: http://help.slides.com/knowledgebase/articles/774057-presentation-size