In addition to the Immediate window (as described in another answer), the viewport is very useful in these circumstances. You can activate it in the menu "View" → "View window": 
Here you can define:
- Any variable (e.g. your public variables)
- Full term, for example.
ActiveWorkbook.UsedRange.Address - The volume of all hours
- Even a breakpoint when a value changes or appears in
True is very convenient for debugging, as it allows you to quickly set conditional breakpoints without adding additional code, for example. if you set the clock to myVar=0 and are active. Break when the value is true, the code will automatically stop the moment when a potential error is triggered.
You can add all these parameters in the “Add Clock” dialog box, which you will either get by right-clicking on any variable (or other code) in the code module or by right-clicking in the viewer:

In addition, you can simply edit any display items in the list by double-clicking.
A very convenient tool for debugging, especially. in combination with locales and instant windows.
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