That would be up elevator--to keep the tail pinned while taxiing (some use down elevator when taxiing away with the wind--to keep wind from getting underneath the horizontal stab). I don't do this, I just use the neutral elevator position when taxiing with the wind. Release this elevator, though, prior to the takeoff roll. With some tail draggers (especially some warbirds), a touch of up elevator is needed during the takeoff roll to keep the nose from powerdiving, but this won't be an issue on your stick, if you located the mains far enough forward. A good idea is to put the axles even with the leading edge of the wing, and your nose overs should be minimal, or non existent!