How do I see waypoints I have added to my NUVI 750?

It only shows you routes.

I understand that you created a list of Waypoints using MapSource. Now, connect your 750 via USB to your PC and wait for a minute until the connection is made. On MapSource, with the list of Waypoints showing on the map, select Transfer > Send to Device (you may also have an icon at the top that looks like a GPS with a downward arrow). In the box that opens up, be sure it sees your nüvi 750(Unit ID:xxxxxx), check the box that says Waypoints and select Send.

These are now in your Favorites file on your nüvi. You may select one as a destination for your route just as you would select a POI. On the 750 (at least), the icons for these Waypoints/Favorites will show up on your map screen well before you will see POI icons. I see them on the 3-D map several miles out.

I had tried that but had set the waypoint icons as small dots and they just were not very visible. I deleted them and changed the icons to flags in Mapsource and reloaded to NUVI and they are there.
THANKS,
Lakedawgs

Yep, I forgot that the default icon is barely a blip. Good thing they provided a library of colorful icons to choose from and they show up pretty well.

I didn't know it's able to display waypoints... sorry.