How to show item/lines in gateway output

Hi

I want to show following:

PM order

|

Notification 1

| |

| lines from read_text for one object

| lines from read_text for another object etc.

|

Notification 2

| |

| lines from read_text for one object

| lines from read_text for another object etc.

etc.

I have created it so far, in method "ORDERS_GET_ENTITY", where I can show my PM order.

My issue is to show the notification below the PM order, and below each notification I need to show texts.

Can anyone help me, or navigate me to a good guide?

Thanks

Aikon