# Change size and color of markups fiducials

**URL:** <https://discourse.slicer.org/t/change-size-and-color-of-markups-fiducials/14063>\
**Category:** Support\
**Created:** [October 15, 2020, 10:11pm UTC](https://discourse.slicer.org/t/change-size-and-color-of-markups-fiducials/14063 "2020-10-15T22:11:19Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![jj31](https://avatars.discourse-cdn.com/v4/letter/j/ccd318/32.png) [@jj31](https://discourse.slicer.org/u/jj31)\
**Post date:** [October 15, 2020, 10:11pm UTC](https://discourse.slicer.org/t/change-size-and-color-of-markups-fiducials/14063/1 "2020-10-15T22:11:19Z")

</div>

I’m loading a list of fiducials programmatically using:  
slicer.util.loadMarkupsFiducialList(file.fcsv)

Then, I’m trying to change their color and size using the following:

defaultMarkupsFiducialDisplayNode = slicer.vtkMRMLMarkupsFiducialDisplayNode()  
defaultMarkupsFiducialDisplayNode.SetColor(255,255,255) #Color of fiducials on simulation slice  
defaultMarkupsFiducialDisplayNode.SetGlyphScale(1.5)  
slicer.mrmlScene.AddDefaultNode(defaultMarkupsFiducialDisplayNode)

But it doesn’t work. Any ideas on why is not working?  
Thanks,

JJ

---

<div class="post-metadata">

**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:** [October 15, 2020, 11:39pm UTC](https://discourse.slicer.org/t/change-size-and-color-of-markups-fiducials/14063/2 "2020-10-15T23:39:00Z")

</div>

`AddDefaultNode` changes the default for new nodes. If you want to change it for a specific node then modify the display node of that particular markups node:

```python
markupsNode = slicer.util.loadMarkupsFiducialList('file.fcsv')
markupsNode.GetDisplayNode().SetSelectedColor(0.3, 0.6, 0.1)

```

Alternatively, you can save your markups in a json file (`something.mrk.json`) and define both point positions and display properties in this file:

```json
{
    "@schema": "https://raw.githubusercontent.com/slicer/slicer/master/Modules/Loadable/Markups/Resources/Schema/markups-schema-v1.0.0.json#",
    "markups": [
        {
            "type": "Fiducial",
            "coordinateSystem": "LPS",
            "controlPoints": [
                { "label": "F-1", "position": [-53.388409961685827, -73.33572796934868, 0.0] },
                { "label": "F-2", "position": [49.8682950191571, -88.58955938697324, 0.0] },
                { "label": "F-3", "position": [-25.22749042145594, 59.255268199233729, 0.0] }
            ],
            "display": {
                "color": [0.4, 1.0, 1.0],
                "selectedColor": [1.0, 0.2196078431372549, 0.9215686274509803],
                "glyphType": "Sphere3D",
                "glyphScale": 16.2,
                "useGlyphScale": true
            }
        }
    ]
}

```