Jump to the code, stop hunting for it
Command + click a call and you land on its definition. Click the definition and you get everyone who uses it — which is what you actually wanted to know.
- Indexes the whole project, not just the open file
- A picker when there is more than one destination
- Go to symbol (⇧⌘O) and file outline (⌘F12)
- Jump history to get back where you came from