Clicking the Paper & Margins tab will give you several more configuration options.

Margins (mm)

If you require margin sizes different than the default 10mm, enter your settings in the appropriate text boxes.

Paper Size (mm)
Open the drop-down-box and select the size of your printing paper, for example A4 210 x 297. This will set the correct width and height measurements.

Orientation

Select either Portrait or Landscape. The number of parameters or data fields in your printout may make printing in Landscape orientation a necessity.