View > Tab > 1st Tab already has a default shortcut of Ctrl + Numpad1 View > Tab > Last Tab doesn’t have a default shortcut, but Shortcut Mapper can assign one quite easily (Settings > Shortcut Mapper > Main menu, Filter = last, click on Last Tab and Modify to set to whatever keyboard shortcut you would prefer) Notepad++ has hundreds of menu commands (a thousand? probably pretty close). They cannot all come with default keyboard shortcuts, and the user is expected and encouraged to customize the shortcuts to match their individual needs.I think what is really needed, are 2 new keyboard shortcuts to:
(a) move to/from 1st and last tab
(b) move to/from previously selected tab.
If Settings > Preferences > MISC page’s Document Switcher section has both ☑ Enable and ☑ Enable MRU behavior turned on, that’s exactly what Ctrl+TAB does. If you don’t hold down the Ctrl, it just toggles between the current tab and the previously-used tab. And if you hold down the Ctrl, it allows you to navigate through in order from most recent (top of list) to least recent (bottom of list).
So all three features you mentioned already exist, and 2 out of the 3 have default keyboard shortcuts already defined. So to get everything you want, you just have to use the Shortcut Mapper to assign a key to the Last Tab command (which might naturally go to Ctrl + Numpad0, to align with the the Ctrl + Numpad1 for the 1st Tab).
Useful References Document Switcher feature: https://npp-user-manual.org/docs/user-interface/#document-switcher Document Switcher preferences: https://npp-user-manual.org/docs/preferences/#misc