# How do i change to absolute dimension instead of addition?

**URL:** <https://discourse.shapr3d.com/t/how-do-i-change-to-absolute-dimension-instead-of-addition/30545>\
**Category:** Modeling Questions\
**Created:** [February 27, 2024, 8:18am UTC](https://discourse.shapr3d.com/t/how-do-i-change-to-absolute-dimension-instead-of-addition/30545 "2024-02-27T08:18:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![hanbaobao](https://avatars.discourse-cdn.com/v4/letter/h/cc9497/32.png) [@hanbaobao](https://discourse.shapr3d.com/u/hanbaobao)\
**Post date:** [February 27, 2024, 8:18am UTC](https://discourse.shapr3d.com/t/how-do-i-change-to-absolute-dimension-instead-of-addition/30545/1 "2024-02-27T08:18:08Z")

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![Screenshot 2024-02-21 at 4.34.58 PM](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/e/9/e980c1edeacb4c788bb1af74190b65380d772d6f.png)

Hi all,

I am currently using shapr3d on Mac. I recall that when changing dimension of extrusion, it was always to change the absolute dimension, however idk is it some settings i did or updates that it become addition method now (see attached). This meant if i want to reduce the thickness or extrusion, i have to manually calculate the difference and enter a negative value instead of the absolute thickness i want. Help?