# When returning to edit an extrusion, never collapses all the way

**URL:** <https://discourse.shapr3d.com/t/when-returning-to-edit-an-extrusion-never-collapses-all-the-way/21072>\
**Category:** Modeling Questions\
**Created:** [August 24, 2022, 7:21am UTC](https://discourse.shapr3d.com/t/when-returning-to-edit-an-extrusion-never-collapses-all-the-way/21072 "2022-08-24T07:21:32Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Comus57](https://avatars.discourse-cdn.com/v4/letter/c/53a042/32.png) [@Comus57](https://discourse.shapr3d.com/u/Comus57)\
**Post date:** [August 24, 2022, 7:21am UTC](https://discourse.shapr3d.com/t/when-returning-to-edit-an-extrusion-never-collapses-all-the-way/21072/1 "2022-08-24T07:21:32Z")

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After creating an extrusion and returning to the work to adjust an extrusion’s dimension after closing the program, I can never get the extrusion less than 1mm. I have to delete it and start over.

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**Author:** ![KPeter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/kpeter/32/7644_2.png) [@KPeter](https://discourse.shapr3d.com/u/KPeter)\
**Post date:** [August 24, 2022, 8:31am UTC](https://discourse.shapr3d.com/t/when-returning-to-edit-an-extrusion-never-collapses-all-the-way/21072/2 "2022-08-24T08:31:08Z")

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Hey @Comus57! Is it possible that the grid resolution (the # unit value in the upper right corner) is set to 1 mm? That means the smallest step of interactions is 1mm, but you can apply custom inputs by tapping on the dimension tab or zooming in to change the grid resolution.

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**Author:** ![Comus57](https://avatars.discourse-cdn.com/v4/letter/c/53a042/32.png) [@Comus57](https://discourse.shapr3d.com/u/Comus57)\
**Post date:** [August 24, 2022, 12:07pm UTC](https://discourse.shapr3d.com/t/when-returning-to-edit-an-extrusion-never-collapses-all-the-way/21072/3 "2022-08-24T12:07:25Z")

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Ok I just tried it. I zoomed in to max .001 and able to extruded an object to a minimum thickness of .001. I was still not able to edit the object since it still has a z structure. The scale shouldn’t have anything to prevent reducing the extrusion regardless of what scale is indicated. Also I’m using iOS version Shapr3D.

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**Author:** ![Stephen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/stephen/32/16350_2.png) [@Stephen](https://discourse.shapr3d.com/u/Stephen)\
**Post date:** [August 24, 2022, 8:12pm UTC](https://discourse.shapr3d.com/t/when-returning-to-edit-an-extrusion-never-collapses-all-the-way/21072/4 "2022-08-24T20:12:27Z")

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I sometimes find it faster to type in the extrusion amount I want, on those occasions when I haven’t zoomed in enough.

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**Author:** ![Comus57](https://avatars.discourse-cdn.com/v4/letter/c/53a042/32.png) [@Comus57](https://discourse.shapr3d.com/u/Comus57)\
**Post date:** [August 25, 2022, 5:03am UTC](https://discourse.shapr3d.com/t/when-returning-to-edit-an-extrusion-never-collapses-all-the-way/21072/5 "2022-08-25T05:03:14Z")

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Tried that. Same problem, but thanks anyway.