The symptom occurs because the projector is not level with the screen, and you need to adjust the keystone.
As the correction level increases, the picture quality on the screen may deteriorate. Therefore, it is recommended that you first physically adjust the projector's position as much as possible by moving it up, down, left, and right and then use the keystone correction function.
Try this
1. Select the Settings menu → General → Keystone using the remote control.
2. Use the left and right buttons to adjust the screen to the desired condition.
To adjust the left/right screen, rotate the mini-beam left/right.
If the product is installed on the ceiling, select "Invert" (Setup → Projection Mode → Invert).
This guide was created for all models, so the images or content may be different from your product.