How do I prevent my text from being italicized when I annotate it with additional glyphs?
For example if I add a "hat" to a variable, z as in $\widehat z$, but want z to not be italicized to match its use elsewhere:
Remove[z]; Plot[x^2, {x,-5,5}, AxesLabel->{"P("<>ToString@StringForm["``",z]<>")", "Q("<>ToString@StringForm["Overscript[``, ^]",z]<>")"}, PlotTheme->"Classic"] Conversely, how do I force z to be italic when it lacks an annotation (ToString@Style[z,Italic] doesn't do the trick)?

