Dear Sabreena,
The unit of the time axis in the image you shown is in second. Please check the right top-side of the display. You may zoom on the data, or set the range of each axis manually. However, you need to make sure that the time window used in the simulation (you can check its value in the layout properties popup window) is within the time range you set manually to be able to view the signal.
Regards,
Ahmad