Popup Menu
This menu is visible when right clicking either within a selected region on the alignment, on a sequence name, and also when right-clicking a sequence feature. It may not be accessible when in 'Cursor Mode' (toggled with the F2 key).
Mac Users: pressing CTRL whilst clicking the mouse/track pad is the same as a right-click. See your system's settings to configure your track-pad's corners to generate right-clicks.