Basically there is no way to do this. What i had to do was create two
buttons beside each other and then go into the conditional formatting
properties of each button. I "selected field or group" and chose my
"optional group" and said if "is present" then show the "Advanced <<<"
for the Advanced <<< button's properties, then I did the same the for
the advanced >>> button's properties except putting "if is not
present".

Works like a charm :)