Mouse Hover marker to display new info Window (and close any previous open info Window). To show info window you should do following steps :

Step 1 Go to Add or Manage Map and scroll down to ‘Info window Settings’ section.

Step 2 Point to ‘Show Info window on’ option and select ‘Mouse Hover’ from drop down list.

How to show info window of the map on Mouse Hover Wpmapspro

Step 3 Save the map and open it in a browser.