Add a voltage probe

On the Schematic Design toolbar, click Voltage Probe . The Voltage Probe dialog opens, presenting options for you to modify label properties before or during placement of the probe label.
Click to place the probe in a precise location in the circuit.
Drag the cursor into a clear space, and click to place the label.
If you want to place another probe, click the location and place the label.
If you want to remove voltage probes, click the label end of the probe, then right-click and select Delete. In this Delete mode, you can click other voltage probes to delete them also.