how to choose the input of the groupDataSets filter

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 ( 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.

Use Ctrl Key when clicking to select multiple item in the pipeline browser.

Hello, Mathieu, Thanks a lot for your help! It is convenient but a little bit tricky to use at first time.