It is possible. When you click on the little cube on the right of the screen you eventually get to the render-screen. under the cube are little magnifying-glasses with a + and a - on them. If you click them in wire-view they adjust the camera, but if you click them in the render-screen you zoom in and out on the image. This will however still result in the line being invisible at times. For instance if you zoom out so you view the image at 1500x1000 instead of 3000x2000 the line will be invisible half the time of the last pass. This is because not all the pixel lines are shown on screen as result of the zooming out.

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