Ctrl + Tab, Moves the input focus from window to window. 5rx;?yvn  
Ctrl + letter, Shortcut for many ZEMAX tools and functions. For example,, Ctrl-L invokes the 2D layout plot. All the keyboard shortcuts are listed alongside the menu items. BV01&.<|  
F1..F10, Function keys are also used as shortcuts for many functions. All the keyboard shortcuts are listed alongside the menu items. V_Oj?MMpn  
Backspace, When an editor window has the input focus,, the highlighted cell can be edited using the backspace key. Once the backspace key is pressed,, the mouse and left-right cursors can be used for editing. N