As you noted there are plenty of ways to map this kind of behaviour yourself. Mapping <C-N> is already mentioned in the README.markdown file, and the newly documented :NERDTreeFocus command can be used for this purpose as well.
These types of maps are really up to the individual user, so you'll have to experiment with the macros that you might want. Generally, that will be some combination of mappings involving :NERDTreeToggle and :NERDTreeFocus.
I'm recommending to @PhilRunninger that this issue be closed since no real issue with the NERDTree is reported here.
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As you noted there are plenty of ways to map this kind of behaviour yourself. Mapping
<C-N>is already mentioned in theREADME.markdownfile, and the newly documented:NERDTreeFocuscommand can be used for this purpose as well.These types of maps are really up to the individual user, so you'll have to experiment with the macros that you might want. Generally, that will be some combination of mappings involving
:NERDTreeToggleand:NERDTreeFocus.I'm recommending to @PhilRunninger that this issue be closed since no real issue with the NERDTree is reported here.