The simultaneous 2-point press is available on the touch panel of GT27.
However, placement of switches for the simultaneous 2-point press has restrictions.
The simultaneous 2-point press is not supported by GT25 and GT21.
For the details of restrictions, refer to the following manual.
・ GT Designer3 (GOT2000) Screen Design Manual (SH-081220)
"8.2.3 Precautions for a touch switch"