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Editorial Team
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Asked: 2026-05-13T23:35:34+00:00

I’m using FDF to populate a PDF template. On my PDF template, I have

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I’m using FDF to populate a PDF template. On my PDF template, I have a checkbox and radio field called c1 and r1 respectively. What’s the syntax I should use in my FDF file to check or select the c1 and r1 field?

I tried things like 

<</T(c1)/V(1)>>
<</T(c1)/V(checked)>>
<</T(c1)/V(on)>>
<</T(c1)/V(true)>>

But none of them work.

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1 Answer

  1. Editorial Team

    I found the answer. To check, use

    <</T(c1)/V(Yes)>>

    To turn off, use

    <</T(c1)/V(Off)>>

    I found the answer on this page:
    http://www.4dcodeexchange.net/fdfformbuilder.htm

    Excerpt

    Checkboxes come in 2 flavors grouped
    and individual. Individual checkboxes
    will usually have a value of “Yes” or
    “Off”. Grouped checkboxes are
    different in that each checkbox will
    have its own value. If you have
    problems with your FDF, look here
    first.

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