Ctrl + Tab, Moves the input focus from window to window. T
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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. 6YGr"Kj &  
F1..F10, Function keys are also used as shortcuts for many functions. All the keyboard shortcuts are listed alongside the menu items. =u"|qD  
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. Ayt!a+J  
Left double click, If the mouse is positioned over any graphic or text window,, double clicking will cause the window contents to be recalculated and redrawn. This is the same as selecting Options,, Update. For editor windows,, invokes the solves dialog box. E9-'!I