Tool tip windows (otherwise known as flybys) are especially designed for obtaining dynamic circuit information 'on the fly'. Tool tips are available both for providing pop-up help on component instances, and for monitoring electrical or control signal quantities during a simulation.
To monitor an electrical or data signal during a run:
Left-click on a blank part of the Schematic canvas (this is to ensure that the Schematic canvas is the active window).
Move and hold the mouse pointer over the signal wire that you want to monitor. In a second or two, a window should pop up as shown below:
If the mouse pointer is held over a wire carrying an electrical signal, the flyby will indicate the voltage in kilovolts at that electrical node. The flyby shown above indicates that this is EMTDC node NT_2, which is a scalar quantity (i.e. single-phase node). The value of the node voltage at the instant this snapshot was taken was -39.3877 kV.
If the mouse pointer is held over a data (control) signal, the signal value will be shown in the flyby.
NOTE: Flyby information for data signals cannot be viewed unless the Store Feed Forward Signals for Viewing parameter in the Dynamics section of the Project Settings dialog is enabled.