Hello ! A big thanks for this add on ;)
I just have a couple of questions ^^

1- Is there a way to use alt ou ctrl to toggle this add on by adding something in custom menu ?

2- which option do you use to select the target on your cursor with left mouse click ?

3- Last question, I’ve try to activate option for mount with Marchand , but I don’t see differences, I have miss something?

A really big thanks for your work, it’s a amazing add, I don’t understand why blizzard don’t deploy this themselves…

Sorry it took me this long to respond, @Pi-Man-15. I've been busy playing PoE 2 for the past few weeks and haven't paid much attention to the addon other than answering questions on Discord.
Now to answer your questions:

1. Unfortunately Blizzard doesn't allow modifier keys (CTRL, ALT, SHIFT) to be used as keybind without being associated with an alphanumeric key.

2. I use Reticle Targeting to select my targets and click casting to cast skills. But if you want to use one of the click casting bindings to select the target under your crosshair, it would be this one:
   

3. I've updated the list of merchant mounts that work with that feature in the latest version. Please update your addon and let me know if it works. If it doesn't, we can go from there and try to figure it out.