Correct, but he asked for several days now and still understand nothing although several people tried to help.
On the other hand OpenCPN
and its plugins seems to need large manuals
to be operable for the average user. Almost nothing is self-explaining and intuitive to use. Mostly only the developers knows how something works. This is a very bad software
style and developers should not see this software
as a playground for themselfes but usable for the average user. Nobody reads many, many pages of manuals
or even understand them.
Your suggestion for a graphical selection is the right step and there are many other items which can make software more intuitive. The developers should be forced to either make their software more intuitive to use or to pull back their software.