Here is a quick video that shows one of my favorite features in LabVIEW: 'Highlight Execution'
This is a simple example that I built and ran (taken from the Getting Started Guide) that shows a VI that simulates a sawtooth signal with a variable amplitude that can be adjusted with the amplitude control, processes it with a function and then outputs both the original signal and the processed signal to a waveform graph indicator.
Debugging will never be the same.