Adobe Acrobat Arbitrary Mask


Zip Code


For a five-digit U.S. postal code.


Zip Code + 4


For a nine-digit U.S. postal code.


Phone Number


For a ten-digit telephone number.


Social Security Number


For a nine-digit U.S. Social Security Number. Hyphens are inserted automatically after the third and fifth digits.


Arbitrary Mask


Changes the format category to Custom and makes another text box available, in which you can type a custom format. Use this option to specify which types of characters the user can enter in any given position, and how the data displays in the field.



Accepts only letters (A–Z, a–z).




Accepts spaces and most printable characters, including all characters available on a standard keyboard and ANSI characters in the ranges of 32–126 and 128–255.




The letter “O” accepts alphanumeric characters (A–Z, a–z, and 0–9).




Accepts only numeric characters (0–9).For example, a mask setting of AAA–p#999 accepts the input BOE–p#767. A mask setting of OOOOO@XXX accepts the input vad12@3Up.

Example of an Arbitrary Mask entry

Posted on October 19, 2008, in Web Dev and tagged . Bookmark the permalink. 1 Comment.

  1. Please could you help?

    I would like my text field box to take the value of a combo box as a mixture of letter and number.
    Please could you tell me what details i need to put into the Arbitrary mask box.

    For example: Test 1 (Combo box) A1 (Value) = to display in the text field box = A1

    Please advise.


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