Let all chord notes sound when adding notes with “Alt+numbers”

When I add chord notes above my root note with holding “Shift + Note name”,
all chord notes sound accordingly.

However, add chord notes with holding “Alt + numbers”,
only “number’s” note sound.

I wish I could listen all chord sounds as same as Shift + Note name.

Anyway, MuseScore is really awesome…!
I’m so thrilled all the time what you guys are going.
Thank you so much!