# Constraining sketches relative to other sketches

**URL:** <https://discourse.shapr3d.com/t/constraining-sketches-relative-to-other-sketches/41108>\
**Category:** Modeling Questions\
**Created:** [June 25, 2026, 3:33pm UTC](https://discourse.shapr3d.com/t/constraining-sketches-relative-to-other-sketches/41108 "2026-06-25T15:33:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![brian2](https://avatars.discourse-cdn.com/v4/letter/b/9e8a1a/32.png) [@brian2](https://discourse.shapr3d.com/u/brian2)\
**Post date:** [June 25, 2026, 3:33pm UTC](https://discourse.shapr3d.com/t/constraining-sketches-relative-to-other-sketches/41108/1 "2026-06-25T15:33:57Z")

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![IMG_4276](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/5/6/565758de8b943682e8c66a4f455cb7967f7eac50.jpeg)

I’m new to Shapr3D on iPad. I have a hexagon sketch and want to place a circle constrained to a construction line between the midpoints of the top and bottom hex. Is there a way to constrain geometry in a new sketch to an existing sketch? I’m very familiar with Creo and Onshape, and those programs it seems you can constrain a second sketch relative to construction lines or other features in a first sketch or features of an existing extrusion, for example. Is it possible or am I just missing some simple functionality?

Basically what I’m trying to do here is extrude the hexagonal surface, and then have a circle extrusion on top of that, dimensioned from the center of the hexagon

[https://support.shapr3d.com/hc/en-us/requests/new](https://support.shapr3d.com/hc/en-us/requests/new)

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [June 25, 2026, 4:07pm UTC](https://discourse.shapr3d.com/t/constraining-sketches-relative-to-other-sketches/41108/2 "2026-06-25T16:07:47Z")

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Not sure why you want to use different sketches for that but you can constraint your circle to the line using midpoint constraint.