Slide Size in iCloud Keynote

Hello annanc14,

We would like to see how we can help you with using Keynote for iCloud. Check out this link for help customizing the presenter display: Play a presentation on your computer in Keynote for iCloud - Apple Support

"You can view and modify the contents of the presenter display at any time when you’re playing a presentation. For example, you can choose to show or hide the current or next slide, edit your presenter notes, and change the font size.

1. If the slideshow isn’t already playing, click the Play button  in the toolbar (if the presentation is also available on Keynote Live, a pop-up menu appears; choose Play on This Computer from the pop-up menu).
2. Move your pointer over the bottom center of the slideshow, and when the controls appear, click the Open Presenter Display button .
3. On the top-right side of the presenter display, click the Presenter Display Options button , then select the items you want to see in the window.
4. 
5. To show or hide the slide navigator, click the Slide Navigator button  in the upper left.
6. To change the presenter notes, move your pointer over the Notes field, then do any of the following:

• Add or edit your notes: Click the Edit button, start typing or select and edit text you want to change, then click Done.
• Change the text font size: Click a font size button.
• Change the text color to black or white: Click Invert Colors. If your note text color is neither black nor white, the it doesn’t change when you click Invert Colors. (This setting affects only your notes; other text colors in your presentation remain unchanged.)"

Cheers!