Group notecards in Chorme on Chromebook (i.e not Windows or Mac)

Group notecards in Chorme on Chromebook (i.e not Windows or Mac)

Hi - I'm trying to figure out how to group two notecards (within the same notebook). I can easily figure out on my phone, but my laptop uses Chrome browser on a Chormebook - so the instructions to press and hold CTRL for Chrome in Windows does not bring up the option to select cards to group together.  

Any help is appreciated!