How to add faces to underside of a model Hi. Attached is an image of just the bottom verts of a model that I have. I have hidden the top section so it can easily be seen.
I plan to print the model, so this is the open underside face, I need to create faces on this underside to effectively close the model, would anyone know an easy way of doing this?

Your help is really appreciated.

Thanks.Richard.
Thanks all. I managed to sort and print the model with copying the top part of the model, extruding then scaling global Z to scale 0. Much appreciate everyones comments. Thanks again.