How to change the font size of Orbbec Viewer in Arm64

Hi
How do I change the font size of the Orbbec Viewer in arm64(ubuntu) with the Nvidia Jetson AGX Orin development kit?
As you see the picture, the font size is too small to see. Please help me to enlarger/setting the font size.

Rick

Clicking accessibility icon on the top bar and selecting Large text