how to hide the pink circles (underwater rocks)

[MazatlanMexico]

Hi;
I think is a good feature to have at all times except when one is navigating on high seas. How do I go about hiding all of the pink circles with a cross on the charts? See screenshot here:
https://login.filesanywhere.com/fs/v...8a6066737aa0a2

[GordMay]

You might have better luck getting specific answers on our 'OpenCPN' forum.
➥ https://www.cruisersforum.com/forums/f134/

[MazatlanMexico]

Thanks, will post there.