Many commands of Atlantis can be invoked using their assigned keyboard shortcuts (or simply "hot keys").
Note that the Help topics refer to the default hot keys of Atlantis. The actual hot keys in your Atlantis might differ if they were adjusted through the "Tools | Customize | Hot Keys..." menu
The main menu or simply menu is a horizontal bar with clickable commands anchored to the top of the main window of Atlantis:
Click a command category below for the list of the corresponding default hot keys: