Here are some useful links and notes on how to setup Lineage OS for your F(x)tec Pro¹ device.
Actually most of the information you need can be find on Lineage OS F(x)tec Pro¹ page.
From there you will learn how to install and build Lineage OS on your device.
Some of the tips below will be...
I wanted to use a Snackbar message popup for users to select a couple of options instead of just the one offered by standard Snackbar. I first deployed this solution in Fulguris to allow users to choose between image or link when doing a long press on image link.