This page is available only if Specify location of variable names and values using character positions is selected on the Variable Extraction page (and there is at least one header line in your data file). Use the controls on this page to extract variables from the file path/filename and file header, extracting information by character position from a "variables" preview window.
Use this preview window to select variables for extraction. The content of this preview window includes four standard file name variables (path + filename.extension, path, filename.extension, filename). Also included are any file header lines that were identified on the Header Lines page. Each variable name/value is preceded by a line number -- the Line value in the Variable group (see below).
Each line of information in the variable preview window is presumed to contain variables and variable values (you decide which is which). Note that each of the following can be chosen independently from each line in the preview window.