The customer can also save a design and load a previously saved session. A saved session can be deleted. They can print the window as it appears on the monitor. If necessary the user can access a help file for additional information. Since several instances of the DiffAmpCalc can be open at any one time it is possible to create multi stage designs. The user can design multi-stage diff-amp systems manually by copying the output noise density and output voltages from the preceding stage into the inputs of the next stage. Automatic dynamic links between stages of a multi-stage design is not active in this release.