I think he may be asking how does he get charts
with detail to appear. Assuming that is the case .....
does not come with charts suitable for navigation
. The built in World Chart does not have the detail. You need to get charts separately, and it depends on what part of the world you want as to which is the best choice. If you check the OpenCPN manual (or Help), there is a good explanation about charts and the different options.
CM93 charts cover the world and are used by many cruisers. There is a current
separate thread about how to get these charts, as well as several older threads. Search for CM93.