Hi Takuya,
It would be nice if multiple notes could be merged into a new note or multiple notes could be merged and exported into one document. That would make it easier to create and maintain a document with multiple sections.
Thank you for your continuous efforts to keep Inkdrop application great.
Kazutaka
Hi Kazutaka-san,
Thank you for the suggestion.
Yeah it would be nice to have but I guess it’s a personal preference on how you manage notes.
You can create a plugin to accomplish that using APIs.
I am going to create a Plugin to merge multiple notes into a new note. 
There will be a new H1 and every heading from the merged notes will be increased by 1. Maybe H6 stay H6 or will moved to H7. Not Sure about that yet.