You will be able to:
Upload your own logo to be shown on both the presentation and voter's phones
Customize the colors
Add your own background as part of the theme
End off your presentation with your brand emphasized on the success page
This is an example of how a presentation looks like with your own styling:
How to add your own logotype
You can find where to add your custom logotype when creating a new Theme.
In the edit view, click on “Themes” on the top of your screen
Click “+ Create new theme”
Scroll down to “Logo”
Select the image you want to add, or simply drag and drop your image and wait for it to be uploaded. You can then resize or crop the image to your liking and click "save" to upload it onto your presentation theme.
For your logo we recommend using a ratio of 2:1.
Here is a short tutorial: