When you choose align to a key object in Illustrator it automatically selects an object on the higher layer. If I want to select other object I have to select it manually, which is not comfortable when it is small. Is there a hot key combination to switch between two objects?
No, there isn't a hot key for selecting a key object. You'll need to single-click the desired object.
This article says the same:
- select all the objects
- hold ⌘ and click on your key object ("align to" will be changed automatically)
Align to Key object
from the little dropdown menu every single time you run the script, because there is no way to make it stick. – Joonas Feb 17 '17 at 19:42