# How to mark the value of isolines in two different contours?
**URL:** https://discourse.paraview.org/t/how-to-mark-the-value-of-isolines-in-two-different-contours/15892
**Category:** ParaView Support
**Created:** [December 23, 2024, 9:09am UTC](https://discourse.paraview.org/t/how-to-mark-the-value-of-isolines-in-two-different-contours/15892 "2024-12-23T09:09:19Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Hanegawa\_Arashi](https://discourse.paraview.org/u/Hanegawa_Arashi)
#### Post date: [December 23, 2024, 9:09am UTC](https://discourse.paraview.org/t/how-to-mark-the-value-of-isolines-in-two-different-contours/15892/1 "2024-12-23T09:09:19Z")
Hello everyone!
I have two contours now and I have plotted the isolines of them.
I want to mark the values on the isolines, but I found if I use the “Interactive Select Points On” feature to mark the value in contour A, the values in A would disappear if I do the same in contour B.
So is there any means to keep the values visible both in the two contours in the meanwhile?
Thanks for your help in advance.
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### Author:  [@nicolas.vuaille](https://discourse.paraview.org/u/nicolas.vuaille)
#### Post date: [December 23, 2024, 2:26pm UTC](https://discourse.paraview.org/t/how-to-mark-the-value-of-isolines-in-two-different-contours/15892/2 "2024-12-23T14:26:59Z")
Try to create an `Annotate Attribute Data` filter. Note that you may switch positioning to 3D space instead of default screen space.