This chapter provides information for configuring and controlling the marker functions. The instrument provides up to 13 markers per trace, of which 12 can be direct markers and one (1) a reference marker. Each marker can be individually controlled on/off and positioned as required. If the reference marker is off, each marker provides measurement data based on its display position. If the reference marker is on, each marker provides differential measurement data based on its position relative the reference. Other functions for display options and various types of single- and multi-peak search are available.