ANNEX B to
                                                              Security Agreement


                        SUPPLEMENT TO SECURITY AGREEMENT

                  SUPPLEMENT,  dated  as of  (this  "Supplement"),  made  by , a
corporation (the "Additional  Grantor"),  in favor of CANADIAN  IMPERIAL BANK OF
COMMERCE as administrative agent (in such capacity, the "Administrative  Agent")
for the Lenders (the "Lenders") and Canadian Imperial Bank of Commerce as issuer
of the Letters of Credit (as defined in the Credit Agreement  referenced  below)
(in such  capacity,  the  "Issuing  Lender")  parties  to the  Credit  Agreement
referred  to below.  All  capitalized  terms not defined  herein  shall have the
meaning ascribed to them in the Credit Agreement.

                                    RECITALS

         WHEREAS,  reference  is hereby made to that certain  Credit  Agreement,
dated  as of March    ,  1998,  among  Unidigital  Inc.  (the  "Borrower"),  the
Administrative   Agent,   the  Lenders  and  the  Issuing  Lender  (as  amended,
supplemented  or  otherwise   modified  as  of  the  date  hereof,  the  "Credit
Agreement");

         WHEREAS,  in connection with the Credit Agreement,  the Subsidiaries of
the Borrower (other then the Additional  Grantor)  (collectively  the "Grantors"
and each a "Grantor")  have entered  into the  Security  Agreement,  dated as of
March   , 1998, in favor of the Administrative  Agent for the ratable benefit of
Lenders and the Issuing Lender (as amended,  supplemented or otherwise  modified
as of the date hereof, the "Subsidiaries Security Agreement");

         WHEREAS,  Section 9.9 of the Credit Agreement  requires that should the
Borrower  at any time  acquire or form any  Subsidiary,  such  Subsidiary  shall
become party to the Subsidiaries Guarantee and the Security Agreement;

         WHEREAS,  the Additional Grantor has agreed to execute and deliver this
Supplement in order to become a party to the Security Agreement.

         NOW, THEREFORE, IT IS AGREED:

         1. Security Agreement. By executing and delivering this Supplement, the
Additional Grantor, as provided in Section 19 of the Security Agreement,  hereby
becomes a party to the Security  Agreement as a Grantor thereunder with the same
force and  effect as if  originally  named  therein  as a Grantor  and,  without
limiting  the  generality  of  the  foregoing,   hereby  expressly  assumes  all
obligations  and  liabilities of a Grantor  thereunder.  The Additional  Grantor
hereby represents and warrants the each of the representations and





warranties  contained in Section 4 of the Security Agreement is true and correct
on and as of the date hereof (after giving effect to this Supplement) as if made
on and as of such date.

         2.   Supplement  to  the  Security   Agreement.   This   Supplement  is
supplemental to the Security  Agreement,  forms a part thereof and is subject to
the terms thereof. From and after the date of this Supplement,  Schedules I, II,
III,  IV, V, and VI, to the Security  Agreement  shall be deemed to include each
item listed on Annex D-1 to this Supplement.

         3. Governing Law. THIS  SUPPLEMENT  SHALL BE GOVERNED BY, AND CONSTRUED
AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

                  IN WITNESS WHEREOF, the undersigned has caused this Supplement
to be duly executed and delivered as of the date first above written.

                                               [NAME OF ADDITIONAL GRANTOR],
                                               a                     corporation


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

The place where Additional Grantor keeps its records concerning the Accounts is:

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The Additional  Grantor's chief executive  office and chief place of business is
located at:

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