I recently updated one of our sites to X Pro and the in-line css under column customize no longer has an option to input css.
This is how I was vertically aligning images using marginless columns and inputting vertical-align: middle; in customize under columns.
If I reactivate x theme it appears and I can make the change, then I go back and activate X Pro theme and the change are made but the in-line css field is gone and I have no way to trace how the column is vertically aligning the content.
I have other sites on X Pro and they function with this option with no issues.