When a control is printed, it uses the same appearance settings as when it is displayed on a screen, by default (you can use the Appearance property to customize these settings). Each DevExpress .NET control that supports printing provides print appearances used to paint its visual elements (data cells, headers, etc.) when printed. These appearances can be accessed via the AppearancePrint property.
Printing appearances can also be customized via the Print Appearances Page of the control's Designer.
Ensure that the OptionsPrint.UsePrintStyles (OptionsPrint.UsePrintAppearance in some controls) property is set to true to use print instead of display appearance settings.