If you mean select multiple slides and then PASTE that has never been possible.
You can move through slides quickly by pressing PageDown > CTRL V > Page Down etc
If you have already copied a shape you can use
code to paste it to all of the selected slides.
Code:
Sub paster()
On Error Resume Next
Dim osld As Slide
For Each osld In ActiveWindow.Selection.SlideRange
ActiveWindow.View.GotoSlide (osld.SlideIndex)
osld.Shapes.Paste
Next
End Sub