# Drawing lengths defaulting to 3 and 4 decimal places long instead of 1

**URL:** <https://discourse.shapr3d.com/t/drawing-lengths-defaulting-to-3-and-4-decimal-places-long-instead-of-1/40039>\
**Category:** Modeling Questions\
**Created:** [December 25, 2025, 10:52am UTC](https://discourse.shapr3d.com/t/drawing-lengths-defaulting-to-3-and-4-decimal-places-long-instead-of-1/40039 "2025-12-25T10:52:09Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Moshgra](https://avatars.discourse-cdn.com/v4/letter/m/e36b37/32.png) [@Moshgra](https://discourse.shapr3d.com/u/Moshgra)\
**Post date:** [December 25, 2025, 10:52am UTC](https://discourse.shapr3d.com/t/drawing-lengths-defaulting-to-3-and-4-decimal-places-long-instead-of-1/40039/1 "2025-12-25T10:52:09Z")

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I’m trying to figure out why my drawings keep defaulting to much smaller numbers. Such as when I try to draw a 3.4mm box, it goes to 3.402. If i try to draw 3.5mm its 3.5946. To note, I did project these lines from an object and starting fresh doesn’t cause the issue.

[Video Example](https://vimeo.com/1149308616?share=copy&fl=sv&fe=ci)

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**Author:** ![shaprvision](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@shaprvision](https://discourse.shapr3d.com/u/shaprvision)\
**Post date:** [December 26, 2025, 7:34am UTC](https://discourse.shapr3d.com/t/drawing-lengths-defaulting-to-3-and-4-decimal-places-long-instead-of-1/40039/2 "2025-12-26T07:34:57Z")

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By drawings I believe you mean sketches (not a nitpick, but you may want to change your post title).

I just tried this as well and even with snap to grid on (all else off) and the grid size set to .1mm it will sometimes increment .0001mm between grid lines. I don’t know if this is a bug or intentional.

I never use the grid though and always type in the dimension and make sure it’s locked or use a variable. Otherwise, the dimensions can change accidentally or due to other constraints.

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**Author:** ![Moshgra](https://avatars.discourse-cdn.com/v4/letter/m/e36b37/32.png) [@Moshgra](https://discourse.shapr3d.com/u/Moshgra)\
**Post date:** [December 26, 2025, 12:04pm UTC](https://discourse.shapr3d.com/t/drawing-lengths-defaulting-to-3-and-4-decimal-places-long-instead-of-1/40039/3 "2025-12-26T12:04:17Z")

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Won’t let me adjust the title, thanks for pointing it out.

I think what happened was the object was moved 0.002mm and after projecting the edges to a new sketch, it took on that property, so every new line started out that way. It feels intentional.

I guess my biggest issue is that if I somehow accidentally move a miniscule amount, I can’t find a good way to center an object, or even align an edge to an axis.

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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:** [December 26, 2025, 1:14pm UTC](https://discourse.shapr3d.com/t/drawing-lengths-defaulting-to-3-and-4-decimal-places-long-instead-of-1/40039/4 "2025-12-26T13:14:48Z")

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> [@Moshgra](#):
>
> if I somehow accidentally move a miniscule amount, I can’t find a good way to center an object

If you moved the object then there should be move/rotate action in the history. In that case all you need is to delete this action.

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**Author:** ![shaprvision](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@shaprvision](https://discourse.shapr3d.com/u/shaprvision)\
**Post date:** [December 29, 2025, 4:03am UTC](https://discourse.shapr3d.com/t/drawing-lengths-defaulting-to-3-and-4-decimal-places-long-instead-of-1/40039/5 "2025-12-29T04:03:05Z")

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I’m not sure what you mean by center. There are multiple scenarios where centering is possible. In the cases that it’s not, dimension constraints will work. If you have a specific example where you can’t center something, post it and I’m sure someone will have a solution.