I'm using Adobe Animate for quite some time. I use Ease-In and Ease-out quite a lot when I animate different motions. Sadly, manually setting them for each motion tween is time consuming (I know, it takes a few clicks but as animator it is crucial :) )
I have checked in the keyboard shortcut menu but sadly I did not find what I am looking for. I would appreciate your help, thanks.
I figured it out! This link helped me.
Step 1: Open Window -> History. Make your specific action (In my example it is Ease-In in the Classic Motion Tween). Step 2: The action will be stored in the History window. Click on your action in the history window and choose "save selected steps as a command". Name your command how you want. You can check in the "Commands" tab that your action is saved as a command!
Step 3: Go to Edit -> Keyboard Shortcuts. Find your command (What ever you named it...) and then apply a shortcut to it! Done!
These small steps really saves ton of time when animating lots and lots of objects and symbols.