Faces

To make a face out of 2 vertices.

1. Select the 2 faces.  You can press the B key to select vertices.

To make a face out of many vertices.

1. Press the B KEY twice.

2. Click the vertices you would like to select.

3. Press Shift - F.

4. Note - Your polygon has to be closed in order to use Shift F.  If you have an open polygon close it by selecting two vertices and pressing the F KEY.