I noticed there are four USB ports on the Apple Studio Display 21 (ASD 21). Can I use one of those ports to daisy chain the USB cable when using more than one ASD 21 on my Power Macintosh G3 (Blue and White)?

If you daisy chain multiple ASD 21 displays together, the Power Macintosh G3 (Blue and White) may restart itself approximately 3-5 seconds after you shut down. If this occurs, reconnect the additional displays directly to your Power Macintosh G3 (Blue and White).

Alternatively you can use a USB hub. Although the Apple Studio Display 21 is a USB hub, the 4 ports on the side should be used for connecting other USB devices.

Note : The Viewable Image Size of the Apple Studio Display 21 is 19.8 inches.