Not really enough information in your post.
This only works when the “navigation source” is the Skyview internal flight plan.
According to the manual, you select a point through the various options (info, nrst, etc.) THEN press “direct” to get it to navigate there.
This only works on the “Skyview” flight plan. If you are using a navigator (GNS, GTN, IFD…) you have to do it on the navigator, you cannot modify the navigation on an external navigator from the Skyview.