Hi there, I am in the middle of making a small 3d model in Blender. I first added a plain, flipped it by 90 degrees, then extruded it many times to create a cell shape (wobbly rectangle). I now want to add faces to the top and bottom of the shape, to 'cap the ends'. I have tried pressing 'f' with corners, edges and faces selected, but that did not succeed. Please help, and as always, ten points are at stake! PS I am a beginner at this, with about a a week's experience.