The Minidump Flags dialog allows you to specify what data a minidump contains.
The default options are for a "Normal" minidump.
The default is to generate a "Normal" minidump.
Change the combo to "Custom" then select the options that will create the type of minidump that you desire.
The options in the left hand two columns add data to minidumps, the options in the right hand column restrict data that is in minidumps.
For a detailed explanation of these flags please consult Microsoft's Minidump documentation.