To establish the 'Print area' within Excel via the dialog box, implement the subsequent actions:
Action 1. Designate the cell range intended for printing.
Action 2. Navigate to the Page Layout tab on the Ribbon.
Action 3. Select the Print Area option from the Page Setup section.
Action 4. Opt for Set Print Area. This action designates the selected cells for printing.
Action 5. To augment the print area, select supplementary cells and incorporate them via Add to Print Area.
Action 6. To disassociate the established print area, select Clear Print Area from the identical menu.
These directives guarantee the exclusive printing of pertinent data, thereby conserving paper and enhancing output clarity.