Specifications

Multi Window: Using multi window applications and view(3)
8. Drag and Drop content share items between
the application windows. Drag an item to share
from one window to another. Some applications
may not support this feature.
9. Usually, Drag and Drop content feature is supported
when in multi window, application that is available to edit or
attach the contents is included. For example, S-Note ,
Message, E-mail is that.
After activating the S-Note, tap the new note.