Ctrl + click in Eclipse passes to the code of the selected function.
What is the "undo" command? meaning After I did Ctrl+Click how do I auto return to where I was?
To go back to where you came from in Eclipse, choose
Navigate -> Back from the menu bar, or press Alt+Left.
This navigates backwards through the cursor history, and therefore works in general when you navigate to a previous position, not only after an
Open Declaration command.
To navigate forward through the cursor history, press Alt+Right.