Adobe Acrobat XI - Manual (Page 262)

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Forms
Last updated 1/14/2015
Note: The National Association of Computerized Tax Processors (NACTP) guidelines, used by the United States
Internal Revenue Service and state tax agencies, recommend using all uppercase characters for 2D barcode data.
3 To minimize the amount of barcode area for containing the data, double-click the barcode field, and in the Value
tab, write a custom script that restricts data to alphanumeric characters and to a single case. (Text that is either all
uppercase or all lowercase requires less barcode area than the same text written in a mixture of uppercase and
lowercase characters.)
Consider creating additional barcode fields in the form and mapping different data to each barcode field.
Set form field navigation
If a PDF document doesn’t have a specified tab order, the default tabbing order is based on the document structure
unless the user has deselected the Tab Order option in the Accessibility preferences.
You can change the tabbing order after you create the fields. If you are in form editing mode, you can order the tabs by
document structure (default), row, or column. You can also choose the order manually by dragging and dropping fields
in the Fields panel. If you are not in the editing mode, you can change the page properties to order the tabs by row or
column. However, you can’t customize the tab order manually.
Set tabbing order in edit mode
1 If you are not in form editing mode, choose Tools > Forms > Edit. The Forms task pane opens.
2 In the Fields panel on the right, make sure that you have selected Sort By > Tab Order.
3 (Optional) To view the tabbing order for the fields, choose Forms > Tasks > Edit Fields > Show Tab Numbers.
4 Select a Tab Order option:
Order Tabs By Structure Tabs based on the document structure, and follows the order that is set up in the tagging.
Order Tabs By Row Tabs from the upper-left field, moving first left to right and then down, one row at a time.
Order Tabs By Column Tabs from the upper-left field, moving first from top to bottom and then across from left to
right, one column at a time.
Order Tabs Manually Allows you to drag and drop a field where you want it within the Fields panel. You can’t move
a field to a different page, a radio button to another group, or a field to a radio button.
Order Tabs Unspecified Specifies that no tab order is specified. The tab order is determined by the settings in the
page properties.
Set tabbing order in Page Properties
1 If you are in the form editing mode, click Close Form Editing to exit the mode.
2 Click the Page Thumbnails button or choose View > Show/Hide > Navigation Panes >Page Thumbnails to open
the Page Thumbnails panel.
3 Select one or more page icons, and choose Page Properties in the Options menu of the Page Thumbnails panel.
4 Select a Tab Order option:
Use Row Order Tabs from the upper-left field, moving first left to right and then down, one row at a time.
Use Column Order Tabs from the upper-left field, moving first from top to bottom and then across from left to right,
one column at a time.
Use Document Structure For forms with tagged fields, follows the order set up in the tagging.