#includeQPrinter printer; printer.setPageMargins(1.0, 1.0, 1.0, 1.0, QPrinter::Inch);
#includeIn this example, the setPageMargins function is used to set the margins of a printed document to 2 cm on the left and right sides, and 3 cm on the top and bottom. The fourth argument to the function specifies the unit of measurement to use, in this case, millimeters. Package library: Qt Library.QPrinter printer; printer.setPageMargins(2.0, 3.0, 2.0, 3.0, QPrinter::Millimeter);