To create an On click popup, please, follow the steps bellow:
1. Go to the Pages/Posts section of your Dashboard
2. Choose the Page/Post you want to add an On click popup
3. Click "Insert popup"
4. From the box, select the popup you need to open On click
5. Choose the load type, select "On click"
You should enter a text inside your popup shortcode so that a popup will open when clicked.
After updating the page you can preview it and see the following page:
And here's the popup when you click on your click text:
That's it! Now you'll have an Onclick popup on your page/post!