What are the steps to save your created theme and add them to the theme selection menu?
As I know, you can’t to add your created theme to the selection menu. But you can find your theme file in: home/.config/ardour5 under the name “my-name-ardour.colors”, where the name is the theme, which you’ve changed (Blueberry, Caineville, Clear-Gray…). Of course, it addressed to the linux user (don’t know where that folder is located in win or mac). Just copy “my-name-ardour.colors” file somewhere to store it for further using