develop the multi layer design. ?

So I had to make a SSD or sequence Diagram now we have to make a multi design diagram?

for the multi design. will we just be creating one big diagram of the assignment for this part?

or is it going to be a collection of a bunch of separate diagrams. as books shows a few of them? regarding layers?

For example create a diagram to cover all different layers/steps

So should be a collection of 3 or more diagrams for Part 3 of TMA3

do I have this correct?

as in do multi diagrams are they a bunch of different diagrams? or just one big one?