How to copy notebook of same literature?

Hi,

I noticed that if I take note (denoted as note_a_1) on the mindmap (m_1) induced by one literature (a) in Study, then the note_a will be attached to this mindmap m_1.

My question is, when I open a new mindmap m_2 induced by same same literature (a). I still want to use the note_a_1 as a starting point, how should I do this ?

Thanks very much.