Hopefully i am missing something here and being really stupid. Can you remove the custom marker (Light Blue) on the map?

The reason i ask is the Clairvoyance spell seemed to be pointing me towards my custom marker and NOT the quest marker when i was lost in the depths. Took me forever to get out because of this.

Any ideas?

Click another part of the map that isn't a marker and select remove.

Go back to your map, and check the key at the bottom that tells you what button does what. I think the same button that places the marker also removes it.

Thanks, i will give this a go later.