I created a rectangle by pointing and clicking 4 anchor points. My question is, is there a way to connect two already existing anchor points to create a diagonal segment? I am trying hard with the pen tool and the direct selection tool but I'm not having any luck. Thanks!

  • Lucian's answer is correct.. but to expand a bit.. In Illustrator anchor points can only have 2 path segments connected to them - an "in" and an "out". It's never possible to have an anchor point with 3 paths.
    – Scott
    Commented Apr 10, 2017 at 15:20

1 Answer 1


If the path is closed you need to open it by removing one segment between 2 corners (left image). Then add 2 points away from the corners (middle image). Then hit Ctrl+U then A and drag these 2 points on top of your corners (right image).

enter image description here Be advised this will leave the path open since you cannot use the same anchor point twice for a closed path. It will look closed, but it will be open.

So if you need different colours for each half of the shape, this will not work. You will have to build 2 different triangular & closed paths.

enter image description here

  • Thank you Lucian, very clear!! Playing around I also found an alternate solution that is using a segment between the anchor points. But sad that is not possible to connect anchor points multiple times, as in geometric design would be really useful Commented Apr 10, 2017 at 14:30
  • You probably need to use multiple closed shapes instead of simulating with an open shape. If you feel this answers your question try clicking the check icon and the up arrow next to my answer above. Thanks!
    – Lucian
    Commented Apr 10, 2017 at 14:32
  • When you see something like this, these are all separate closed shapes to be able to use color individually - wlester.files.wordpress.com/2012/09/pattern5.jpg
    – Lucian
    Commented Apr 10, 2017 at 14:39
  • Thank you, i will check this technique out as I'll probably want to use this type of color filling that remind of shadows in my works. Thanks a lot! Commented Apr 10, 2017 at 14:41

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