What are the dimensions of the 4iE custom background image?
The 4iE custom background screen is 320 x 240 px. However, image scaling is not required thanks to auto-scaling when you upload your custom background.
Tips: Make sure the image you use has a 4:3 landscape aspect ratio (standard camera aspect ratio), to avoid the image being stretched when we scale it. We accept jpg, png, HEIC. Not PSD etc.