# "Constrain points to surface" feature
**URL:** https://discourse.slicer.org/t/constrain-points-to-surface-feature/36632
**Category:** Support
**Tags:** resample, slicing, reslicing, markups-fiducials, markups, landmarks
**Created:** [June 7, 2024, 1:18am UTC](https://discourse.slicer.org/t/constrain-points-to-surface-feature/36632 "2024-06-07T01:18:17Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@taylorfisher](https://discourse.slicer.org/u/taylorfisher)
#### Post date: [June 7, 2024, 1:18am UTC](https://discourse.slicer.org/t/constrain-points-to-surface-feature/36632/1 "2024-06-07T01:18:17Z")
Operating system: 3D Slicer
Slicer version: 5.6.1
Expected behavior: My colleague has an older version of 3D slicer. In Markups → Resample section he has an option of “constrain points to surface”
Actual behavior: I cannot seem to locate a similar feature in my version (5.6.1) and was wondering if this feature was disable or moved? If so, where could I find it or constrain my landmarks in a similar fashion?
For transparency, I am very new to 3D slicer. Appreciate the help!
---
### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [June 7, 2024, 1:27am UTC](https://discourse.slicer.org/t/constrain-points-to-surface-feature/36632/2 "2024-06-07T01:27:57Z")
> [@taylorfisher](#):
>
> My colleague has an older version of 3D slicer. In Markups → Resample section he has an option of “constrain points to surface”
Constraining options are moved out from the resampling section to `Curve settings` section because constraining is no longer limited to be used during resampling but is applied to the curve continuously.
Constraining was also greatly improved: you can not only project the curve to the surface but you can also place just a few points and find shortest path on the surface (optionally taking into account surface data, e.g., to avoid or prefer certain regions).
---
### Author:  [@taylorfisher](https://discourse.slicer.org/u/taylorfisher)
#### Post date: [June 9, 2024, 11:14pm UTC](https://discourse.slicer.org/t/constrain-points-to-surface-feature/36632/3 "2024-06-09T23:14:36Z")
Thank you, appreciate that information very much!