Siblings

Can someone add a little info on the subject of siblings. I’m in the group section of the audio montage and checked or not checked I’m not able to see any result or difference in the selection of clips, on lanes or tracks.
The other options of tracks or global work as expected. But the sibling option is a mystery.

Siblings are clips spread on several lanes or tracks, and that have the exact same start position and length. When the option is checked, these siblings are moved and resized in sync.

ah, the exact same length was the missing piece of info
thank you…