Access: How to get subform to expand

Dear Doug,

Thanks for you reply.

Unfortunately the method described is not what I'm looking for: From Subform_Stores_orders_Comments ... by removing the navigation buttons it took away the ability to add a new comment; made it shorter & removed the scroll bars so existing comments could no longer be seen; and it still doesn't shrink/grow depending on the number of comments.
Note: the database you attached doesn’t correspond to the explanation given ... the Subform_Stores_orders_Comments scroll Bars property is set to ‘both’ and (from the main form) it’s height is not 1.1cm (oh, I've just seen - you meant the stretch width, not height)

Subform_Stores_orders_Comments
I would like this form to be set short to start with and grow when there are more than one or two comments. There will only be a maximum of four so there is no danger of it overflowing the tab control.
Note 1: I put a border around it so I can see if it really is shrinking/growing
Note 2: Because the subform should grow, there is no need for scroll bars; they are just there now because it doesn't grow

SUBFRM_Tab3
I would like this form to be set tall to start with and shrink when there aren't enough records to fill it. When there are more records than can fit, it should add scroll bars - which is the case now

It's the shrink/grow properties I'm interested in and don't understand why they don't work.

Many thanks
Joe