In the debugger you have a Variables view and an Expressions view.
The Variables view shows all variables and objects that are available when you hit a breakpoint or fall into the debugger with an error.
This list can be quite large and you might have to dig deep in a tree to find, lets say a global variable, you wanted to check.
To focus on some specific objects and/or variables you can use the Expressions view. You need to right click on the view and select Add Watch Expression to get a dialog where you can type in your expression to watch. Of course you need to make sure you don't make any typos.
There is however a faster and easier way of doing all this. Simply drag the variable from the Variables view to the Expressions view and drop it there.
You perhaps want to check out the result of some expression you use in your code ? Just copy the code and paste it into the Expressions view.
So Drag & Drop and Paste are your friends when it comes to the Expressions view
Thanks to Providence for showing me this.
Happy debugging!