Disappearing vertices when I seperate a section.

I’ve created a circle with 5 vertices, extruded it to give it a thickness, and then sperated one of the sides with the P key. Then I moved the new section to it’s own layer. The new seperate section now has no vertices, and I can’t go into edit mode to add any. Can anyone explain what I’m doing wrong?

I think you need to have both layers for both parts of the mesh selected at once, use the Shift key whilst choosing the relevant layers, then enter Edit mode, and you should then be able to see the verts.

Hope this helps