How do I make an unfilled (outlined) ellipse or rectangle?

1. Make a new layer in the Layers palette. Do this by either clicking the New Layer button at the bottom of the Layers palette or by choosing Layer > New > Layer.
2. In the toolbox choose the rectangular marquee, or the elliptical marquee (hiding under the rectangle).
3. Click and drag to create as selection outline of the size and shape that you want for your unfilled shape. Press the Shift key as you drag your selection to constrain your selection to be a perfect circle or square.
4. Make sure the new layer that you just added is selected in the Layers palette. The selected layer is dark blue. In need by, click on the layer to select it.
5. With your selection outline active, choose Edit > Stroke. Enter a Width for your outline. Click on the color square if you want to pick a new color. Choose one of the Location radio buttons to set where the stroke goes relative to the selection outline. Click OK to add the stroke.
6. Deselect by choosing Select > Deselect, or by pressing Ctrl-D.