Can I set triggers for signup pop-ups?
Yes, it is possible to set a trigger for a sign-up pop-up form.
Click on the pop-up form to go inside it. Click on the Configuration tab at top of the form. You can see the Triggers section. Hover over it so you see the pencil icon at far right.
Clicking on it will allow you to set a preset trigger or even build a custom trigger.
Note that you would not be able to see the pencil icon if the popup is running. You need to pause it using the Pause button at top right first.
Once done, you can click on Save.