You can move entries to a different Collection either from the entry form or from a Collection table.
Move from entry form
To move entries to a different Collection, select Move from the More… drop down menu in the entry form.
You have the option to move to an existing Collection or to create a new Collection.
Move from Collection Table
It is also possible to move objects from Collection tables. You can select one or multiple entries from a table and click on the Move button.
Also in this case you can move to an existing Collection or create a new one.