There is the option to choose between holding a button or toggling a button to chain always, chain never, and chain legal.
It would be a lot better if both were available. Like you can click the icons to toggle between the chains and you can hold a key to temporarily go whatever it is keybound to and then when you let go it goes back to what was previously toggled or to default if nothing was toggled.
For example: I click “never chain” icon at the strart of my turn. This is now toggled. Right before I end turn I hold “a” which is keybound to “always chain”. Activate whatever I wanted to activate in the EP and then let the key go and it goes back to “never chain” since that was the last toggled.
A good way to do this, I think, is as follows:
In the settings screen add an option on what the “chain” icons do on the side of the screen(toggle or hold)
And in the keybinds add 2 versions of all the chain buttons. So you have “Chain Always Toggle”, “Chain Always Hold”, “Chain Legal Toggle”, etc.