The App Data Room theme builder helps you to easily create your own look and feel.
For best results, use the following size and dimension suggestions when uploading Theme Graphics.
Windows: 1366 x 768 (This is arbitrary, we recommend this because it typically means a smaller file size = faster download). For an image that fills the whole space, the aspect ratio is roughly 45:46. EX: If you had an image that was 1366 px wide the height would be 1396.
The max upload size is 2MB