Video8 (Page Lifecycle Overview | Using the Debugger)
To add a Breakpoint to any object, just select it and press the key F8.
After adding the Breakpoints, you can start the debugger and then start the application using 1-click publish.
Use F9 to step at a time.
To see a value of a variable under
Locals, you need to double click on the variable name. It will show all the values for that variable, even if it is a complex aggregate. For simple values, the variables are displayed inline.