All objects populating the margin area support drag & drop. The effect of a drag & drop operation depends on the entities that are involved as drag sources (those that are dragged) and targets (those onto which entities are dropped).
A large variety of entities from the margin area can be dropped into the margin area.
Furthermore, entities can also be dragged from other entity managers and browsers. Entities can be dragged from the margin into other windows, browsers or even other applications like Word. In the latter case, the ATLAS.ti entity lose their ATLAS.ti specific "objectiveness" but at least they render into something useful, e.g., a formatted title and rich text comment.
When a code or memo is dropped on a quotation bar, a new link is created between the entity and the quotation represented by the bar.
Dragging a quotation bar onto another quotation bar creates a new hyperlink between the two. See Creating Hyperlinks.
When a margin entity is dropped onto another margin entity it is replaced.
Three operations are accomplished at the same time: the entity is removed from its original quotation, it is linked to the target quotation, and it replaces the entity it was dropped on (the latter is cut from its quotation).
When you drag and drop a hyperlink, code or memo in the margin to another quotation holding down the CTRL-key, then the hyperlink, code or memo is copied.