A first input is received in an animation creation application having a user interface showing a virtual-space area for first objects, and a timeline area for second objects representing events. To generate the first input, a user presses and holds an input control while a cursor is over one of the first or second objects. It is determined whether the input control is held for at least a predefined duration. If so, a copy of the object is assigned to the cursor, and the copy is subsequently pasted at another location in the user interface upon the input control ceasing to be held after the cursor is moved to the other location. If the input control does not remain held for at least the predefined duration the copy of the object is not assigned to the cursor.