How to change font size?

[crossknight]

I am not sure how to change the font size of the printer.

[informagico]

Hello, I know it's a little late but I wrote a simple extension class that achieve the font size setting (@mtmsuhail could be interesting to see this implemented)

public static class PrinterExtensions
{
    [Flags]
    public enum PrintStyle
    {
        HeightNormal = 0x00,
        Height2X = 0x01,
        Height3X = 0x02,
        Height4X = 0x03,
        Height5X = 0x04,
        Height6X = 0x05,
        Height7X = 0x06,
        Height8X = 0x07,
        WidthNormal = 0x00,
        Width2X = 0x10,
        Width3X = 0x20,
        Width4X = 0x30,
        Width5X = 0x40,
        Width6X = 0x50,
        Width7X = 0x60,
        Width8X = 0x70,
    };

    public static void SetStyle(this Printer printer, PrintStyle style)
    {
        printer.Append(new byte[] { 0x1D, 0x21, (byte)style });
    }
}

you can then use it like this:

Printer printer = new Printer("FooBar");
printer.SetStyle(PrintStyle.Height2X | PrintStyle.Width2X);

Source