# Saving control point phase

**URL:** <https://discourse.slicer.org/t/saving-control-point-phase/31232>\
**Category:** Support\
**Created:** [August 18, 2023, 9:04pm UTC](https://discourse.slicer.org/t/saving-control-point-phase/31232 "2023-08-18T21:04:43Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![admarques](https://avatars.discourse-cdn.com/v4/letter/a/ba9def/32.png) [@admarques](https://discourse.slicer.org/u/admarques)\
**Post date:** [August 18, 2023, 9:04pm UTC](https://discourse.slicer.org/t/saving-control-point-phase/31232/1 "2023-08-18T21:04:43Z")

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Operating system: Ubuntu 22.04.1  
Slicer version: 5.2.2 r31382  
Expected behavior: Control points save the physical position and the corresponding phase  
Actual behavior: Control points save only the physical position

I’m working with a dataset of ct images that contain different phases. I would like to select control points in the 2d view and distinguish them between phases. It looks like the default option only saves the physical position, but there is no information about which phase the point belongs to.  
Is it possible to include the phase information together with the physical position?

Thank you

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [August 18, 2023, 9:11pm UTC](https://discourse.slicer.org/t/saving-control-point-phase/31232/2 "2023-08-18T21:11:29Z")

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You can make markup point list to be a time sequence, using Sequences module: add a new sequence node and make the point list the proxy node of that sequence.

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<div class="post-metadata">

**Author:** ![admarques](https://avatars.discourse-cdn.com/v4/letter/a/ba9def/32.png) [@admarques](https://discourse.slicer.org/u/admarques)\
**Post date:** [August 21, 2023, 2:50pm UTC](https://discourse.slicer.org/t/saving-control-point-phase/31232/3 "2023-08-21T14:50:10Z")

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Thank you!  
In this way, the points look being stored in arrays. Do you know how I can assign these arrays to a Python variable?