I'm following the instructions gven in your webstorm 8 youtube video: https://www.youtube.com/watch?v=JBkGOPR3-nA
Holding alt and selecting the position for curosoirs does not work nor does alt + slide down.
According to the video it should work with Linux. Mint 17 is the same as Ubuntu 14 LTS, just a different UI.
using Storm 8.02
Many thanks !