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                                                   718
        CHAPTER 8                                                              Interactive Features



KEY     TYPE         VALUE

Ff      integer      (Optional) A set of flags specifying various characteristics of the field (see Table 8.70
                     on page 676, Table 8.75 on page 686, Table 8.77 on page 691, and Table 8.79 on page
                     693). When imported into an interactive form, the value of this entry replaces that of
                     the Ff entry in the form’s corresponding field dictionary. If this field is present, the Set-
                     Ff and ClrFf entries, if any, are ignored.

SetFf   integer      (Optional) A set of flags to be set (turned on) in the Ff entry of the form’s cor-
                     responding field dictionary. Bits equal to 1 in SetFf cause the corresponding bits in Ff
                     to be set to 1. This entry is ignored if an Ff entry is present in the FDF field dictionary.

ClrFf   integer      (Optional) A set of flags to be cleared (turned off) in the Ff entry of the form’s corre-
                     sponding field dictionary. Bits equal to 1 in ClrFf cause the corresponding bits in Ff to
                     be set to 0. If a SetFf entry is also present in the FDF field dictionary, it is applied be-
                     fore this entry. This entry is ignored if an Ff entry is present in the FDF field dictio-
                     nary.

F       integer      (Optional) A set of flags specifying various characteristics of the field’s widget annota-
                     tion (see Section 8.4.2, “Annotation Flags”). When imported into an interactive form,
                     the value of this entry replaces that of the F entry in the form’s corresponding annota-
                     tion dictionary. If this field is present, the SetF and ClrF entries, if any, are ignored.

SetF    integer      (Optional) A set of flags to be set (turned on) in the F entry of the form’s correspond-
                     ing widget annotation dictionary. Bits equal to 1 in SetF cause the corresponding bits
                     in F to be set to 1. This entry is ignored if an F entry is present in the FDF field dictio-
                     nary.

ClrF    integer      (Optional) A set of flags to be cleared (turned off) in the F entry of the form’s corre-
                     sponding widget annotation dictionary. Bits equal to 1 in ClrF cause the correspond-
                     ing bits in F to be set to 0. If a SetF entry is also present in the FDF field dictionary, it
                     is applied before this entry. This entry is ignored if an F entry is present in the FDF
                     field dictionary.

AP      dictionary   (Optional) An appearance dictionary specifying the appearance of a pushbutton field
                     (see “Pushbuttons” on page 686). The appearance dictionary’s contents are as shown
                     in Table 8.19 on page 614, except that the values of the N, R, and D entries must all be
                     streams.

APRef   dictionary   (Optional; PDF 1.3) A dictionary holding references to external PDF files containing
                     the pages to use for the appearances of a pushbutton field. This dictionary is similar to
                     an appearance dictionary (see Table 8.19 on page 614), except that the values of the N,
                     R, and D entries must all be named page reference dictionaries (Table 8.100 on page
                     721). This entry is ignored if an AP entry is present.

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