Some useful Lotus Notes Shortcut Keys are listed below.
ALT+F5           Restore Notes to default minimized size
ALT+F9           Minimize active window
ALT+F10         Maximize active windows
CTRL+BREAK   Stop operation in progress
CTRL+F6         Switch between open windows
CTRL+Q           Exit Notes
CTRL+TAB       Move to next window tab
DOWN ARROW Move to next entry in Replicator
END                 Move to last entry in Replicator
ENTER             Open selected Workspace icon, window tab, menu item, bookmark
ESC                 Close active window
F1                   Get Help on current feature
F5                   Lock User ID
F6                   Move to next pane or frame
F10 or ALT       Access menu bar
HOME              Move to first entry in Replicator
PAGE DOWN    Move to previous page in Replicator
PAGE UP          Move to next page in Replicator
SHIFT+F10      Access Windows context menus
UP ARROW      Move to previous entry in Replicator
SHIFT+ALT+S Open Search menu