There are 2 ways to achieve this.
Either:
- Left-click function name that you want to open.
- Ctrl + t
- Ctrl + enter
Or:
- Change setting
Editor > Goto Location: Multipleto begotoAndPeekorgoto - Ctrl + Alt + [click on function name]
Both methods will open the definition in the split to the right (or create a new split if this is the right-most split).
You like?