On the "Maps" page in your Wordpress Admin, there is an option to upload a customized pinpoint graphic. This pinpoint will appear whether you use Google Maps or the custom image modes of MapifyPro. When uploading or selecting a new pinpoint image, don't forget to click "Insert into Post" at the bottom of the Meida pop-up.
Note that this is the default pinpoint graphic. However you can add unique pinpoints PER location by uploading an image under the specific location settings, found under the Map Locations tab. This allows you to have any number of specific location graphics on your map.