Can you go below 200 pixels in height on a Keynote canvas?

Keynote 6.6.2. OS 10.11.5. MacBook Pro - really fast.

I have to design for 5 screens with 5 different aspect ratios.

I do most of my design for screens in Keynote.

Problem:

Some of the screens have heights of less than 200 pixels such as

3584 X 56 and 1576 X 160. Long and not very high. These are at a stadium.

Is it possible to get Keynote to go below 200 pixels in height when setting up my

canvases?

Thanks for any help you may have.