I'm trying to get a preview rendition of two lasers running off 1 X FB3 and one flipped L/R on the horizontal axis by internal switch . I've played with both the `mirror position' and `mirror output' and can't seem to recreate the real situation in the preview window. The ' Mirror output' checkbox doesn't seem to do anything that I can see ? Do I need Beyond to do this ? Another question - I can set the Preview window in Projection zones/ Preview settings at 200 X 200 pixels , but the only way I can get the preview window bigger on the main sceen is by dragging down , then it is 2:1 rectangle so I'm not sure of the meaning of the 200 X 200 setting. Thanks in advance.