How do I know if the driver is successfully installed?

When the driver is completely installed.

Windows OS:

1. You should find a "tablet" icon in the task bar.
2. Enter tablet setting from the icon and try to draw in the test area:
3. If you could get pressure sensitivity in the test area, the driver was installed well.

Mac OS:

1. You should find "TabletSetting" in Launchpad.                                                                   
2. Enter "TabletSetting" and try to draw in the test area:                                                       
3. If you could get pressure sensitivity in the test area, the driver was installed well.