This dialog is used to describe which files to use for a sequence of files, either for input or output.
If this is checked, the frame/field numbers will be zero padded to the number of decimal places specified in the following edit field. The edit field is only enabled if this option is checked. For example, if this option is checked and the edit field is set to "4", the number "1" would appear as "0001".This option is checked automatically if you select a file with a number that starts with a zero (0). The edit field is set to the number of digits in the number.