Cannot find BLOB Download Format Mask link.

Hello,
I cannot find the "BLOB Download Format Mask" link and I am using a current version of APEX. can someone tell me where I might find it? I have followed the instructions and see no such link under Page Item, Source. Please help!
Thanks
LEH

Scott,
Yes, I have created a form on a table and that table contains a column of datatype BLOB. I followed the APEX advanced tutorial for uploading and downloading files. Now I want to be able to display the (Blob) images that I have uploaded.
As I research the topic, I get the feeling that displaying the BLOB image can only be done in APEX 3.1 and up. Is this true? I have that version of APEX installed on my laptop and have successfully completed the "Defining and Viewing BLOB Data in Oracle Application Express 3.1" tutorial found here: http://www.oracle.com/technology/obe/apex/apex31nf/apex31blob.htm
But I could not do it on the company server that runs APEX 3.0
Even if I did get the approval to have the company APEX application upgraded to 3.1, there still is the issue of scaling the images so that they are not so large. I understand that there is a UTIL.APEX function "GET_BLOB_FILE_SRC" that would do this for me. I read the documentation at:
http://download.oracle.com/docs/cd/E10513_01/doc/appdev.310/e10499/api.htm#CHDICGDA
After reading it, I was still not clear as to how to use it correctly. Is there any documentation on how to implement this function in APEX?
I did find something that I was hoping would help me. The article is entitled "Show Blob of other table in APEX Form" by Dimitri Gielis can be found here: http://dgielis.blogspot.com/2008/07/show-blob-of-other-table-in-apex-form.html
I tried to import the file "blob_support.sql" application (on both APEX 3.0 and APEX 3.1 systems) but got errors. I'm not having very much luck here and would appreciate the help in pointing me in the correct direction.
Help!!
Thanks
LEH

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