You use the Delimiter tab to set file delimiters for data sources. Typically, immediately after you open a data source, you set the file delimiter (the character that separates the data source fields). By default, the rules file expects fields to be separated by tabs.
In the Delimiter tab, in the Delimiter group, you select the delimiter:
Comma
Tab
All spaces
Custom—To set the character that you enter in the text box as the delimiter. You can enter any standard ASCII character between 0 to 127.
To fix the width of data-source columns, select the “Column width” option, and enter a width in the text box. At minimum, a column must be able to contain a five-digit number.