How I can change a length(width) of sloping object in illustrator? For example, there is an image which tell about my problem enter image description here

How can I change more fast (and more correctly) positions of points from red circles to green circles?

I know a one approach when I make a path on the part of shape. Then I convert it to guide and then change positions of points, but with this approach I can't control a slope between this points. But I think this approach is very difficult and there is more simple approach.

Any suggestions?

3 Answers 3


here's one way,

  1. Ctrl+C, Ctrl+F, to make a copy of the shape
  2. Grab the Rotate Tool (R), click on anchor A to set rotation point, then drag to rotate the segment to a horizontal position.

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  1. click on segment B, and Shift drag to the right, or tap on the Right Arrow to extend the segment to the desired length

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  1. grab the Rotate Tool (R) again, click and Anchor A to set rotation point, then drag Anchor C and drop it on top of Anchor D

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  1. remove original shape, or send copy to back to use it as guide to drag original shape's anchors onto it.

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  • You can dispense the copy once you rotate illustrator will remember the angle just alt click and type minus in front.
    – joojaa
    Oct 4, 2015 at 9:58

without drawing a path and convert it into guide you can use a guide line directly, by dragging a a a guide line from the ruler and rotate it to the extended direction and then snap your point over the guide line.

enter image description here

  • I think this way is not exactly and more difficult, because when I rotate a guide I can change a slope of path, because guide line dont snap to points Oct 1, 2015 at 12:08
  • Never!!!. If you snap to points you will never miss it. I think you didn't give it a try.
    – hsawires
    Oct 2, 2015 at 16:44
  • Maybe something I do not understand. Can you demonstrate a little videodemo, please? Oct 3, 2015 at 19:48

Were you having a problem when you are trying to move the points one at a time? Try selecting both points before you move them. Or you can select the path in between the points and move it.

  • This way is not correct, because when I am dragging a path between the points I can change an angle of slope. This way suitable only approximately. Oct 1, 2015 at 12:06

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