Other preference tips: How should I save my preferences, or how do I reset form•Z to factory defaults?
Only save Preferences at the beginning of a session. If you have been working for awhile and then save your preferences, it will store all the system options that you have changed while you have been working — and most likely this will include many options that you are not aware of and probably do not want. This can cause form·Z to appear to behave “erratically” because the next time you launch form·Z, it will be using different settings than it was previously. Therefore, you should launch form·Z, change anything and everything that you can think to add to your System Preferences file, and save these preferences. As you get to work you will inevitably find additional items you wish to add to these preferences. At this point it is recommended that you make a note in a text document or on a sheet of paper and, whenever it is convenient, quit form·Z, re-launch, make these changes, and then save the preference file. This way you will save exactly what you want in your preferences, and not