Using the BigTreeTech Pad 7 is easy. First, turn it on and connect it to your 3D printer using the supported interfaces like USB 2.0 or Ethernet. If you want to customize it, you can use the provided CB1 OS Image and source code. To replace the CB1 core board with a CM4, carefully follow the instructions in the manual. When using the tablet, keep it in a dry and clean environment. Avoid exposing it to direct sunlight for long periods as it may affect the screen's performance. For maintenance, you can use a soft, dry cloth to clean the screen. If there are any issues with the software, you can reinstall it using the provided files. Also, make sure to regularly check for software updates to keep the tablet running smoothly.