# The wrong lines are moving when I modify dimensions…

**URL:** <https://discourse.shapr3d.com/t/the-wrong-lines-are-moving-when-i-modify-dimensions/22824>\
**Category:** Modeling Questions\
**Created:** [December 3, 2022, 5:39pm UTC](https://discourse.shapr3d.com/t/the-wrong-lines-are-moving-when-i-modify-dimensions/22824 "2022-12-03T17:39:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mikeschn](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/mikeschn/32/10254_2.png) [@mikeschn](https://discourse.shapr3d.com/u/mikeschn)\
**Post date:** [December 3, 2022, 5:39pm UTC](https://discourse.shapr3d.com/t/the-wrong-lines-are-moving-when-i-modify-dimensions/22824/1 "2022-12-03T17:39:02Z")

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I am trying to position one sketch inside another sketch. So for example, sketch1 might be some sort of a rectangle. Then I offset a plane, and start sketch2. Lets say that’s a triangle type shape… I want to tie the triangle to the rectangle with a couple dimensions… but I can’t pick any lines of the rectangle.

So then I project the lines of the rectangle onto the plane I created… Now I can add dimensions between the projected rectangle and the triangle… problem is, instead of the triangle moving, the projected lines of the rectangle are moving… How do I keep the projected lines of the rectangle from moving?

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [December 3, 2022, 5:41pm UTC](https://discourse.shapr3d.com/t/the-wrong-lines-are-moving-when-i-modify-dimensions/22824/2 "2022-12-03T17:41:40Z")

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You have two options:

1. Lock the sketch that you don’t want to move
2. Control which sketch moves when adding the constraint by the selection’s order

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [December 3, 2022, 5:58pm UTC](https://discourse.shapr3d.com/t/the-wrong-lines-are-moving-when-i-modify-dimensions/22824/3 "2022-12-03T17:58:45Z")

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I’m not quite sure what you are trying to do but this might help.  
You can connect a line in 3D space from the triangle to the square sketch by adding a construction plane using 3 points. After that, you can adjust the length of that new line and raise or lower the triangle with respect to that new line.

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/6/8/68711aa36885f576e932a0e51935af29e6cee54e.mov](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/6/8/68711aa36885f576e932a0e51935af29e6cee54e.mov)