When I extrude my edges, they extrude at an angle. I'm trying to make the clothing pattern for a dress, so all the vertices should be on one plane. I'm working on the neckline now (see image). I want to extrude the edges towards the centre and on one plane. But each time I toggle from front view to left view, I see that I extruded the edges at an angle (see image). This was obviously not my intention. Any advice on how how to achieve the desired result?

front view and side view

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    $\begingroup$ As this is 3-dimensional space, extruding can happen in all 3 axes at the same time, I don't see anything unexpected. It is a good modeling workflow to always either have 3 orthographic views opened next to your main one in order to check how geometry is aligned or constantly rotate the view. Edit the question with information how you extruded, what is unexpected and how do you want it. So far the question isn't quite clear. (Also please write more descriptive titles) $\endgroup$ – Mr Zak Sep 22 '18 at 19:46

If you want to work entirely on the X-Z plane, like here (note the little axes on the bottom left):

enter image description here

then, every time you extrude, make sure to do E, then ShiftY: this will exclude the Y axis from the extrusion. This works even if you are not in front view.

enter image description here

To fix a mesh that was mistakenly extruded along the Y axis, do A(A)SY0

enter image description here

  • A: select all (twice if something was already selected)
  • S: scale ...
  •   Y: ... along the Y axis ...
  •     0 ("zero"): ... until its width is 0% of the original
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