# Need To Change Part Length But Can't
**URL:** https://discourse.shapr3d.com/t/need-to-change-part-length-but-cant/27059
**Category:** Modeling Questions
**Created:** [July 29, 2023, 5:13pm UTC](https://discourse.shapr3d.com/t/need-to-change-part-length-but-cant/27059 "2023-07-29T17:13:37Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@shapr3dNewb](https://discourse.shapr3d.com/u/shapr3dNewb)
#### Post date: [July 29, 2023, 5:13pm UTC](https://discourse.shapr3d.com/t/need-to-change-part-length-but-cant/27059/1 "2023-07-29T17:13:37Z")
I’m just getting started with Shapr3D and I just finished creating a constrained, extruded sketch of a part I wish to 3d print. It’s basically a clamp with elongated tabs which are used to squeeze against what it’s going to attach to.
I was looking back over the part and I noticed a made an error in the lengths of the elongated tabs. I’ve tried to change the tab lengths to the correct size and I can’t get the part to change after making the correction in the sketch. Any ideas on how I can change the tab lengths without having to redesign the part from the very beginning again? Thanks.
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### Author:  [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)
#### Post date: [July 29, 2023, 6:07pm UTC](https://discourse.shapr3d.com/t/need-to-change-part-length-but-cant/27059/2 "2023-07-29T18:07:00Z")
Forget about the sketch. Just change the length on the extruded body to suite.
Here I used **Split Body**. Afterwards you can do a **Union** to your desired length.
BTW, after you’ve extruded a body from a sketch, the sketch no longer has a relationship with the new body.
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### Author:  [@shapr3dNewb](https://discourse.shapr3d.com/u/shapr3dNewb)
#### Post date: [July 29, 2023, 6:24pm UTC](https://discourse.shapr3d.com/t/need-to-change-part-length-but-cant/27059/3 "2023-07-29T18:24:52Z")
@TigerMike Thank you for the kind reply. It would be nice if the sketch and the extruded body were still in relationship with each other. It seems, I guess maybe just to me, that if I could just change the sketch, the extruded body would follow. Maybe it would be a good feature request to be able to have both - the extruded body in relationship with the sketch and the extruded body out of relationship with the sketch. Just a thought.
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### Author:  [@Robert](https://discourse.shapr3d.com/u/Robert)
#### Post date: [July 29, 2023, 6:55pm UTC](https://discourse.shapr3d.com/t/need-to-change-part-length-but-cant/27059/4 "2023-07-29T18:55:13Z")
Hi, take a look at this post 👍🏻
> [@History-Based Parametric Modeling is coming to Shapr3D](https://discourse.shapr3d.com/t/history-based-parametric-modeling-is-coming-to-shapr3d/26632):
>
> boom Today, we are announcing that drum History-Based Parametric Modeling drum is coming to Shapr3D. boom At Shapr3D, we’ve always held grand ambitions. Our goal is still to build the best CAD system in the world. But the path to achieving this has not been straightforward. In the early years, we focused on conceptual design, sketching, and prototyping. However, as our product matured, our customers started to express a desire to do more of their work in Shapr3D. After some time, they i…
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### Author:  [@shapr3dNewb](https://discourse.shapr3d.com/u/shapr3dNewb)
#### Post date: [July 29, 2023, 10:15pm UTC](https://discourse.shapr3d.com/t/need-to-change-part-length-but-cant/27059/5 "2023-07-29T22:15:56Z")
@Robert Thanks for the reply. I watched 3 Tube videos for Shapr3D’s History-Based Parametric Modeling. Most interesting indeed. Can’t wait to give it a spin.