Code OARF=printable

Question

My customer has a customize OAF page and coded following OAF Developers Guide
to show their customize OAF page with a printable page after clicking 'Printable Page' button
with code OARF=printable. In R11i, on the printable page, only buttons other than this
'Printable Page' button is shown but after upgrading to R12.1.3, the printable page shows up
with the 'Printable Page' button as well.
In R11.5.10.2, their printable page shows the OAF page without the button
(button for printable page), but now in R12.1.3, the same code shows the button.
The only difference between this 'Printable Page' button and other buttons on the custom
OAF page is that, the ItemStyle=SubmitButton is not shown in the printable page
in both R11i and R12, but this 'Printable Page' button is defined with ItemStyle=button.
Is this specification of R12? If there is a way to hide the 'Printable Page' button in the printable page,
Since this is working correctly in R11i and after upgrade to R12.1 without changing any code,
the page shows with the 'Printable Page' button, this issue should be supported.
Any workaround

Answer 1

ok here is an example :
on my custom page, there are few fields based on which user can search model info . search displays all the documents(or should say the data available on that model) from custom table - ex-
1. document name = Proc2009 , revision =1 , model = A1 , viewicon
2. document name = Proc2009 , revision =2 , model = A1 , viewicon
3. document name = Proc2009 , revision =1 , model = A2 , viewicon
if user picked viewicon for either row1 or row2 (that is data for model A1) : fields to be rendered on the oaf page are say:
width , make, engine, setup_info.
But if user picks row 3 - Model A2, fields to be displayed on the webpage are -
width,make, X-axis,Y-Axis, Provision_info, setup_info
I did not use PPR to hide the fields based on the model but set the property of the attribute setRendered(true or false) in process request. reason being its a very complex matrix, and there are many variants. All this works fine. When I add printable page button, it shows up correctly, but hides some fields that should be there for Model A1 and shows some field for Model A2.
I need get the printable page only for this set(Proc2009, rev=1, model=A1).
did i explain it better this time ?
How can I do it ?
thanks