How to avoid default subscript output with underscore in MuPAd notebook ?

When I'm trying to define a variable P_CG in MuPAD notebook, the default output is PcG. I don't want c to be printed as subscript.

But I want the output to be P_CG.

[Walter Roberson]

In Maple, the way to get around that would be to use \ before the underscore.

P\_CG

The Maple interface would not show the \ but would show P_CG at the time of entry instead of show P with subscript CG

I have seen other systems in which the trick was not \ but rather control-v . But it has admittedly been some time since I last used one with control-v

[Harish Babu Kankanala]

I have tried \, /, ctrl-v and double underscore__ , but I'm not able to print as I have mentioned in my question.