AMENDMENT TO SECURITY AGREEMENT


     AMENDMENT, dated as of October 30, 1998 (this "Amendment") to that Security
                                                    ---------
Agreement,  dated as of March 24, 1998 (as  amended,  supplemented  or otherwise
modified,  the  "Security  Agreement"),  made by  UNIDIGITAL  INC.,  a  Delaware
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corporation  (the  "Borrower")  and each  subsidiary of the Borrower  which is a
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signatory thereto (together with the Borrower, collectively, the "Loan Parties")
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in favor of CANADIAN IMPERIAL BANK OF COMMERCE, as administrative agent (in such
capacity,  the  "Administrative  Agent") for the various lenders (the "Lenders")
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and CANADIAN IMPERIAL BANK OF COMMERCE, as issuing lender (in such capacity, the
"Issuing Lender"),  parties to that Credit Agreement, dated as of March 24, 1998
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(as amended,  supplemented or otherwise  modified from time to time, the "Credit
                                                                          ------
Agreement"),  among the  Borrower,  the  Lenders,  the  Issuing  Lender  and the
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Administrative Agent.

                                    RECITALS

     The  Loan  Parties  party  to the  Security  Agreement  have  notified  the
Administrative  Agent that Hy Zazula  Associates,  Inc., a New York  corporation
("Zazula"),  will merge with and into Unison (NY), Inc., a Delaware corporation,
with Unison (NY), Inc. being the surviving  corporation in such merger. The Loan
Parties  party to the  Security  Agreement  have  requested  that  the  Security
Agreement  be amended to take  account of the assets and  liabilities  of Zazula
being acquired by Unison (NY),  Inc. in connection  with such  acquisition.  The
Administrative  Agent and the  Required  Lenders  are  willing  to agree to such
amendment, but only on the terms and subject to the conditions set forth in this
Amendment.

     NOW,  THEREFORE,  in  consideration  of the premises and for other good and
valuable  consideration,   the  receipt  and  sufficiency  of  which  is  hereby
acknowledged,  the Borrower,  the Administrative  Agent and the Required Lenders
hereby agree as follows:

     1. Defined Terms.  Unless  otherwise  defined herein,  terms defined in the
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Security Agreement are used herein as therein defined.

     2. Amendment. (a) The Security Agreement is hereby amended by supplementing
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Schedules  I, VI and VII thereto by adding to such  Schedules  the  material set
forth on the corresponding Schedules I, VI and VII to this Amendment.

        (b) Section 4(l) of the Security  Agreement is hereby  amended by adding
the words: "Except as set forth on Schedule VII hereto," to the beginning of the
sentence.

     3.  Effectiveness.  This Amendment shall become  effective on the date that
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the  Administrative  Agent shall have  received  this  Amendment,  executed  and
delivered by duly authorized officers of the Borrower and the Required Lenders.

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     4.  Representations and Warranties.  To induce the Administrative Agent and
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the  Required  Lenders  to  enter  into  this  Amendment,  the  Borrower  hereby
represents and warrants to the Administrative Agent that the representations and
warranties  contained in the Security  Agreement and are true and correct in all
material respects as if made on and as of the date hereof and that no Default or
Event of Default will have occurred and be continuing.

     5. No Other Amendments.  Except as expressly  amended hereby,  the Security
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Agreement  shall  remain in full  force  and  effect in  accordance  with  their
respective terms, without any waiver, amendment or modification of any provision
thereof.

     6.  Counterparts.  This  Amendment  may be  executed  by one or more of the
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parties  hereto  on  any  number  of  separate  counterparts  and  all  of  said
counterparts  taken  together  shall be  deemed to  constitute  one and the same
instrument.

     7. Expenses.  The Borrower  agrees to pay and reimburse the  Administrative
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Agent  for  all  of  the  out-of-pocket  costs  and  expenses  incurred  by  the
Administrative Agent in connection with the preparation,  execution and delivery
of this Amendment,  including, without limitation, the fees and disbursements of
Cadwalader, Wickersham & Taft, counsel to the Agent.

     8.  Applicable  Law. THIS AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED AND
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INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

                            [SIGNATURE PAGES FOLLOW]

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     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Amendment to be
duly executed and delivered as of the date and year first above written.


                                   CANADIAN  IMPERIAL BANK OF
                                   COMMERCE, as Administrative Agent and as a
                                   Lender


                                   By: /s/ E. Lindsay Gordon
                                      -----------------------------------
                                      Name: E. Lindsay Gordon
                                      Title: Executive Director
                                             CIBC Oppenheimer Corp., as Agent



                                   MARINE MIDLAND BANK


                                    By: /s/ Gina Sidorsky
                                       ----------------------------------
                                       Name: Gina Sidorsky
                                       Title:  Authorized Signatory



                                    BANK AUSTRIA CREDITANSTALT
                                    CORPORATE FINANCE, INC.


                                    By: /s/ David E. Yewer
                                       ----------------------------------
                                       Name:  David E. Yewer
                                       Title: Vice President


                                    By: /s/ Maura K. Connor
                                       ----------------------------------
                                       Name:  Maura K. Connor
                                       Title: Senior Associate


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                                    MERRILL LYNCH BUSINESS FINANCIAL
                                    SERVICES, INC.


                                    By: /s/ Daniel J. McHugh
                                       ----------------------------------
                                       Name: Daniel J. McHugh
                                       Title: Vice President


                                    By:
                                       ----------------------------------
                                       Name:
                                       Title:


                                    UNIDIGITAL INC.


                                    By: /s/ William E. Dye
                                       ----------------------------------
                                       William Dye
                                       Chief Executive Officer


                                    UNIDIGITAL ELEMENTS (NY), INC.


                                    By: /s/ William E. Dye
                                       ----------------------------------
                                       William Dye
                                       Chief Executive Officer


                                    UNIDIGITAL ELEMENTS (SF), INC.


                                    By: /s/ William E. Dye
                                       ----------------------------------
                                       William Dye
                                       Chief Executive Officer


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                                    UNISON (NY), INC.


                                    By: /s/ William E. Dye
                                       ----------------------------------
                                       William Dye
                                       Chief Executive Officer


                                    UNISON (MA), INC.


                                    By: /s/ William E. Dye
                                       ----------------------------------
                                       William Dye
                                       Chief Executive Officer


                                    MEGA ART CORP.


                                    By: /s/ William E. Dye
                                       ----------------------------------
                                       William Dye
                                       Chief Executive Officer


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