How do I do add an app placed on the right side of the Dock as shown? (On the right of the line separator, along with the Downloads and Trash icons).
This is on a Macbook Air 2015 running Mac OS Catalina, I had this machine since the default OS on Macbook Air 2015. Probably added the app icon there during Mac OS Mojave.
Reason for asking is that I remember actually adding MacVim.app onto the position as shown but forgot how to duplicate this. I don't believe I used any non-native stuff to do this.
If anyone knows a better place to ask this question, please tell me.