Custom Booth Walls are front facing gallery walls on which you can specify exact measures for height and width.
They're thought for those artists in need of a surgical accuracy in terms of measurements.
To create a set-up with a custom booth wall follow these steps:
Head to the Personal Spaces section
On the image dropdown select Booth Wall
Click on Save & Set Up Walls
Define your wall and its measurements. You can use colors to mark a specific area and guide yourself.
That's it! You've created your Booth Wall
See an example: