A marker 
identifies a location on a map. This tutorial shows how to hide markers on page load.
Step 1 Go to Add or Edit Map and Scroll down to the ‘Infowindow Settings’ section.
Step 2 Enable the box of ‘Hide Markers on Page Load’ option.
Step 3 Click on Save Map and open it in browser.
Then you will see location markers will not display on your assigned map.
