To get started using Vial, install a Vial-compatible firmware on your keyboard (if it did not come preloaded with one) and it will be automatically detected by the Vial GUI.
Vial is a completely open project with sources for all components publicly available on GitHub. For information about using Vial and porting a new keyboard to Vial, read through the manual entries linked in the sidebar on the left.
Have a feature suggestion for Vial? Feel free to submit it at the dedicated feedback website.