Vertical Alignment greyed out

[GISAdministrator8]

Hello,

I'm trying to setup a map series and some of the longer map titles require two lines of space instead of one, this leaves titles that require only one line to appear too high instead of centered in the box (see image attached). 

This would be fixed if I could change the vertical alignment but this is greyed out for me.

Any help would be appreciated

[GregoryLund2]

6 Months later.... 😭