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I do not know any TikZ so I cannot use this post, which otherwise is precisely what I am looking for. So how do I make such a square? The best I could come up with was


but it doesn't look good and does not work on vertical lines/arrows.

Now, having done this square my guess would be that the corners would be empty, that is, the edges would not meet each other. How do I fix that problem?

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1 Answer 1

up vote 12 down vote accepted

You want an arrowhead in the middle of the arrow? Use the ‘break’ via |-*=0@{>}. This drops the directional tip, taking up no space. It should work whatever the direction of the arrow.

Hope this helps,


BTW, the list is the best point of contact for Xy-pic related questions.

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Welcome to tex.SX! I hope you don't mind if we try to prove your last sentence wrong ... – Loop Space Nov 28 '10 at 21:35

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