A visualization, alignment and support tool permitting one person fence rail installation, and greatly speeding the installation when more than two persons are employed. Specifically, the tool temporarily affixes to a fence pipe and offers support for a length of fence rail; especially the ends of adjacent fence rails, so that the rails are supported and level relative to a fence pipe bracket which is fastened to the fence pipe. The rail ends can then be fastened with screws or other fasteners to the fence pipe bracket when desired without further adjustment required.