In your panel whenever you want to create hotspots or guides, go to the corresponding tab and click on the +New Guide or +New Hotspot buttons.
Then enter the URL where you want to create them, the extension will open automatically within the URL where you want to create your onboarding content.
You can also open the extension manually
In order to open the extension you need to click on the UserGuiding favicon (see below) in your browser.
If you cannot see the favicon, you might not have installed the extension. For this, click here or visit Chrome Webstore and download UserGuiding.