# Show two volumes overlaid

**URL:** <https://discourse.slicer.org/t/show-two-volumes-overlaid/2626>\
**Category:** Support\
**Created:** [April 18, 2018, 7:02am UTC](https://discourse.slicer.org/t/show-two-volumes-overlaid/2626 "2018-04-18T07:02:10Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![anitakh1](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/anitakh1/32/3350_2.png) [@anitakh1](https://discourse.slicer.org/u/anitakh1)\
**Post date:** [April 18, 2018, 7:02am UTC](https://discourse.slicer.org/t/show-two-volumes-overlaid/2626/1 "2018-04-18T07:02:10Z")

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hello, is it possible to see two volumes one over other. like i want to put segmented output result on original images. how to do it using slicer?

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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:** [April 18, 2018, 2:19pm UTC](https://discourse.slicer.org/t/show-two-volumes-overlaid/2626/2 "2018-04-18T14:19:30Z")

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Yes, and there are many visualization options. You can overlay any number of segmentations over a grayscale volume, both in slice and 3D views. You can also overlay two grayscale volumes and a labelmap volume in each slice viewer, and display these slices in 3D. You can display grayscale volume using volume rendering in 3D.

Have you completed [Slicer introduction tutorials](https://www.slicer.org/wiki/Documentation/Nightly/Training#General_Introduction)? If you still have questions then let us know.

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**Author:** ![mikbuch](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mikbuch/32/69022_2.png) [@mikbuch](https://discourse.slicer.org/u/mikbuch)\
**Post date:** [February 18, 2023, 11:33pm UTC](https://discourse.slicer.org/t/show-two-volumes-overlaid/2626/5 "2023-02-18T23:33:24Z")

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Hi, just a quick shortcut if anybody else would be trying to get this simple functionality:

1. Load and display one of the volumes.

2. Click the “double arrow” option from the top bar in one of the views (screenshot below):

 ![Screenshot 2023-02-19 at 00.29.06](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/d/ad9f01693e9b714380ed4398273c1d0cae69446c.jpeg)

1. Set up your view.

2. Optionally: set up colours for volumes using the “Volumes” module (see the above screenshot).

Bonus: you can also display segments (and labels) on top of the overlaid images.

I found out how to do it thanks to this post: [Visualization of the background and foreground image together - #2 by cpinter](https://discourse.slicer.org/t/visualization-of-the-background-and-foreground-image-together/4981/2)

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**Author:** ![Sheryl](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@Sheryl](https://discourse.slicer.org/u/Sheryl)\
**Post date:** [May 16, 2024, 8:11am UTC](https://discourse.slicer.org/t/show-two-volumes-overlaid/2626/6 "2024-05-16T08:11:53Z")

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I am wondering what does ‘50%’ mean after the foreground?

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**Author:** ![hannaho](https://avatars.discourse-cdn.com/v4/letter/h/ac91a4/32.png) [@hannaho](https://discourse.slicer.org/u/hannaho)\
**Post date:** [May 16, 2024, 11:26am UTC](https://discourse.slicer.org/t/show-two-volumes-overlaid/2626/7 "2024-05-16T11:26:49Z")

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Hi Sheryl,

That’s an opacity setting. You can change how ‘see through’ the foreground layer is with the scrolling bar on the left.