- Layers can be created in OpenCPN and saved as a gpx file, or be created offline manually or by scripts, for example.
- Layers that are saved in a directory called “layers”, in the same place that holds your opencpn.ini(config) file, are automatically loaded on start of OpenCPN. These layers will be listed in the Route Managers Layers Tab on start up. The first time they will all be visible. Adjust visibility by clicking on the “eye” in the first column. This setting will be remembered. Have a look at the first picture on this page!
- The easiest way to find this directory is to go to the
- button in the ToolBar and look all the way down in the first tab (About).
In Linux create the directory: /home/$USER/.opencpn/layers.
- On Mac OS X, the location is “/Users/“username”/Library/Preferences/Layers”. Note that “Library” is a hidden directory in “Lion”.
- Any subdirectories in the layers directory are also loaded.
- Layers worth keeping could be kept in the mentioned “layers” directory and visibility during a session can be handled through “Hide from Chart” or “Show on Chart” buttons. New layers, gpx files, can easily be added in a subdirectory of it's own.
- A few restrictions apply to layer marks. A layer mark cannot be used to set anchor watch on. If right-click-selecting co-located objects, priority is given to non-layer objects.