Pad

Pad implementation determines how the pad value is sized during validation and how the pad value is sized when written as output.

When the data value to be mapped to the target item is smaller than the minimum length of that item, pad characters can be used to pad the data to that minimum length. Input data can contain both content and pad characters. Output data is built according to the pad definitions of the types. Bytes are the default measurement for sizing, however, both byte and character sizing options are available.

Yes
Enables the Pad option. Allows the item to contain both content and pad characters.
No
All data is assumed to be content on input; no pad characters are built on output.