Q: How can I switch the command on the upper right corner of GSK 980TDb CNC controller, the G98 and G99?

A: After turn on the power of GSK 980TDb CNC control, the default command is G98, if you want to switch it to G99, you could execute G99 for once, then will changed.

GSK 980TDb Specification:

http://www.cncmakers.com/cnc/controllers/CNC_Controller_System/GSK980TDb.html