Oregon 300 waypoint symbols help


Hi Everyone,

I own a Garmin Oregon 300. I am trying to find out how to change the waypoint symbols included and to add to them. I've seen numerous ways but they seem to be for other garmin models. If anyone could point me to a tutorial, or better yet, walk me through it, that would be great.

I would really like to add a separately named listing within the listings offered when you select "Edit Waypoint" -> "Change Symbol". For example there exists lists of symbols titled "Outdoors", "Hunting", "Marine"..etc..maybe an additional one called "Custom"