Manual - Direct pass through from the RC input signal to the output. Not to be used with multirotors!
Rate - The stick offset from neutral determines the rate of change on the controlled axis. Bringing the stick back to neutral stops the rotation, but doesn't return the airframe back to level.
Rate Trainer - Same as Rate above but bank angle is limited by value from max bank angle in Attitude mode
Attitude - Stick controls bank angle in Pitch/Roll, without action aircraft stay level. Full stick give max bank angle set for axis in Stabilization tab.
Axis Lock - Like Rate with more 'locking'. Preferred for Yaw control.
Weak Leveling - Like Rate but slowly level aircraft if controls are zero.
Virtual Bar - React like a helicopter with flybar.
Acro+ - Like Rate but at some point go to manual mode for very quick flips.
Rattitude - Mixes Rate and Attitude mode: Attitude when sticks are centered or Rate at full deflection.