Left-justifying submorphs

How do I have vertical rows of submorphs that are left justified, just like you would start writing a shopping list on the left side of each line going down?

It seems so simple... but I was only able to get them to be centered in the parent.

Thanks,
Sean

p.s. I searched the lists on "layout justified" and read the wiki entries

I gave up a moment too soon - "self cellPositioning: #topLeft." did the trick.

Sean