I can do that. Meanwhile, I searched the forum and found that Godra one time responded to similar question by others. Here what he wrote,
"Some controls might still be using that old keypad.
If you edit the code of the control then you can find the section where the "Keypad" is declared and just change it to "KeypadV2", save it and rebuild the solution. This KeypadV2 looks different than the one in your picture.
If it still doesn't allow you to enter negative numbers then try setting its KeypadMinValue and KeypadMaxValue properties."
I went to to DigitalPanelMeter.vb and changed Private KeypadPopUp As MfgControl.AdvancedHMI.Controls.Keypad to keypadV2. Got build error. I think I did not understand what Godra meant.