How to get the lines underneath each other in the upper box? (in libreoffice math)

Hi all, I’m using libreoffice math. Although I use ‘enter’ in the box below, everything is displayd in a single row in the upper box. What am I doing wrong?

You need to use the “newline” command. Something like

"first line"
newline
"second line"

Be careful of brackets and instructions like “color”: they need to be closed on each line! For example

left ( "first line" right none
newline
left none "second line" right )