The preferences window can be opened via the "Menu" button: select "Preferences", or by using Alt+P.

In the preferences window, you can choose default settings for common variables, as well as enter information which may be unique to your testing regime or laboratory. 


The "Apply" button at the right bottom of the Preferences screen is disabled by default. This button can be used to apply the change in the settings but to stay in the Preferences. 

When one of the parameters is altered, the "Apply" button will be enabled. When the change is applied via the "Apply" button, the button will be disabled again.


The "Ok" button can be used to apply all settings and close the Preferences window immediately.


The "Cancel" button can be used to cancel any changes made to the Preferences and to close the Preferences window.