Please consider making the main navigation simpler.
Clicking the 3dot menu system to get to notes takes more time then just clicking notes if it was in the left navigation pane. Plus on a tablet computer, clicking the 3dot menu button is easy, but I often get attachments not notes when clicking the sub-menu with my finger.
Please consider just listing the features in the left navigation pane (attachment: example shown in red) . I think it would be simpler and more tablet friendly. Then maybe your Navigation Options become what features you want listed in the main left navigation pane (display email, calendar, and notes).
Thanks in advanced