fbReader Premium left side slide out

A while back I did something that added a left side slide out that allows edits to some book items like title, tags, etc. I broke the glass in that tab and replaced it with the same model and copied everything over. While it's the same version (fbReader premium) it doesn't have that feature.
I know I simply forgot how to add it and hoping for someone to tell me.


Thanks,

Lot's older oldlincoln