You cannot check the two switches placed at a location where the simultaneous 2-point press is invalid on the screen design software. When creating a screen for the simultaneous 2-point press, display the simultaneous 2-point press invalid area on the drawing screen, and place the switches at a location where the simultaneous 2-point press is valid.

Display the simultaneous 2-point press invalid area as follows.
◆ GT Designer3 (GOT2000) Version 1.100E or later
1. Right-click on the screen editor, and select [Two-point Press Inactive Area] - [Front] or [Back].
2. Select [View] - [Two-point Press Inactive Area] - [Front] or [Back] from the toolbar.

For restrictions on placement of simultaneous 2-point press switches, refer to the following manual.
・ GT Designer3 (GOT2000) Screen Design Manual (SH-081220)
"8.2.3 Precautions for a touch switch"