To add a breakpoint, follow these steps:
After you have added a breakpoint, it will be added to the "Breakpoints" view at the right-hand side of your screen (underneath "Gild Debug").
If there is already a breakpoint on the line that you clicked on in step (1) above, "Add Breakpoint" will be replaced by "Remove Breakpoint" in step (2) above. You may remove the breakpoint by clicking on this. Alternatively, you may follow these steps: