The steps are as follows.
Press the red emergency button on the left,then E-stop
Turn the red emergency button on the left
Press “F2”,for Selective Mach,then input 210 to BCF Pos(S) and choose FileEnd(P)
Press “K1”,for starting the brush
Press “B”,for tracking
“Change tool from 1 to 2”
Press “A”,for coordinate switching
Press “K1”,for starting the brush
“stop the spindle”

The video is as follows.