To Change the Position of a Parts List Header Row (AutoCAD Mechanical Toolset)
In the drawing area, double-click the parts list to edit. The Parts List dialog box is displayed.
To insert the column headings and title at the top of the table, select Top Left or Top Right in the Attach Point list. To insert the heading and the title at the bottom of the table, select Bottom Right or Bottom Left.
To split columns by distributing the data rows evenly among multiple sections, select the Number of sections option and enter the number of sections to split to.
To change the direction that the columns split, select the Wrap left or Wrap right option.