How do I control which fields the app remembers to automatically copy from my last entry to a new entry?

Access the Settings page and scroll down to the "Visible Fields" section then tap the "More Actions..." row
Next tap the "Change Remembered Fields" option
For the fields you want remembered, change the toggle switch to the "ON" state. For the fields you don't want remembered, change the toggle switch to the "OFF" state.
Tap here to learn how to changed which fields are copied from the old entry, to the new entry when you use the copy feature.