First select the click zone to edit. From there, head to the sidebar editor on the right, and look for "Pulsate" and "Pulsate color" properties at the bottom of the style tab.
You can edit the pulse color or turn the pulse effect OFF/ON (via toggle).
TIP: If toggling the pulse off, be sure to call attention to it in some other way whether that's with a hotspot or tooltip text. Otherwise, your tour viewers won't be able to find it since it's invisible without the pulse.