FCHideEpsilon[expr] substitutes
1/Epsilon - EulerGamma + Log[4 Pi] with
SMP["Delta"].
1/Epsilon + Log[4 Pi] - EulerGamma
FCHideEpsilon[%]\frac{1}{\varepsilon }-\gamma +\log (4 \pi )
\Delta
1/EpsilonUV + Log[4 Pi] - EulerGamma
FCHideEpsilon[%]\frac{1}{\varepsilon _{\text{UV}}}-\gamma +\log (4 \pi )
\Delta _{\text{UV}}
1/EpsilonIR + Log[4 Pi] - EulerGamma
FCHideEpsilon[%]\frac{1}{\varepsilon _{\text{IR}}}-\gamma +\log (4 \pi )
\Delta _{\text{IR}}