# how to choose the input of the groupDataSets filter
**URL:** https://discourse.paraview.org/t/how-to-choose-the-input-of-the-groupdatasets-filter/2745
**Category:** ParaView Support
**Created:** [October 10, 2019, 5:26am UTC](https://discourse.paraview.org/t/how-to-choose-the-input-of-the-groupdatasets-filter/2745 "2019-10-10T05:26:08Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@zhe](https://discourse.paraview.org/u/zhe)
#### Post date: [October 10, 2019, 5:26am UTC](https://discourse.paraview.org/t/how-to-choose-the-input-of-the-groupdatasets-filter/2745/1 "2019-10-10T05:26:09Z")
Hello, everyone:
It seems that the groupDataSets filter could combine several datasets together, I’m curious how to choose the different input when I add groupDataSets. It seems on this slides ([https://www.osti.gov/servlets/purl/1408957](https://www.osti.gov/servlets/purl/1408957) at 136 page) there is green arrow that could extract data out, I’m curious how to use that. Thanks a lot for your help.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [October 10, 2019, 5:38am UTC](https://discourse.paraview.org/t/how-to-choose-the-input-of-the-groupdatasets-filter/2745/2 "2019-10-10T05:38:02Z")
Use Ctrl Key when clicking to select multiple item in the pipeline browser.
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### Author:  [@zhe](https://discourse.paraview.org/u/zhe)
#### Post date: [October 10, 2019, 2:41pm UTC](https://discourse.paraview.org/t/how-to-choose-the-input-of-the-groupdatasets-filter/2745/3 "2019-10-10T14:41:28Z")
Hello, Mathieu, Thanks a lot for your help! It is convenient but a little bit tricky to use at first time.
Regards,
Zhe