PrecisionMapper desktop app offers you two ways of processing your data (that is, creating an Orthomosaic). They are,
  • Simple Mode
  • Advance Mode

You can create an Orthomosaic of your survey by any one mode at a time.
The Advanced mode offers greater control over processing variables as compared to the Simple mode. 
In Advanced mode, you can manually adjust various variables associated with the intermediate layers like; feature detection, feature matching, structure from motion and so on. 

Table 1: PrecisionMapper Desktop Application's Modes Comparison

Simple Mode Advanced Mode
Processing Time Less More 
Quality of the Orthomosaic Less  More