Legato in Cubase

When trying to get the notes to reach the next chord by pressing legato (ref red arrow) it only takes effect on 1 of the notes. Any idea why
I am using Cubase 10.

Hi and welcome to the forum,

This button doesn’t exist in Cubase 13. Isn’t it the Extend to Next Selected by any chance? What does the tooltip say?

Thanks for answer. It says ‘apply legato’