Graphics may be exported from ZEMAX and annotated in external software, or they may be annotated directly in ZEMAX via a handy annotation feature.  The annotation feature supports Line, Arrow, Text, and Box commands, in addition to an annotation editor.  Each command has its own specific syntax, which is covered in detail in the “Chapter 2: User Interface > Graphic windows operations > Using the annotation feature” section of the ZEMAX User’s Guide. 

To use the annotation feature, select Window > Annotate from the main menu of the displayed graphic window:



If we select text for example, the Annotate Text dialog will appear, to which you can type in your desired text:



Once “OK” is selected, you may position the cursor to the desired location and click the left mouse button:



To edit or remove the newly created annotation, the Annotate editor may be used (Window > Annotate > Edit).  The Annotate Editor is in the form of a text editor which lists each command in its text syntax form.  This allows for more precise control over the exact locations of lines and text, the control over the text font, and the ability to add more complex annotations.



To remove an annotation, simply delete the line which represents this annotation in the Annotate Editor.  Note that annotation files may also be saved and loaded via the “Save” and “Load” buttons at the bottom of the Annotate Editor.  With some additional commands, the diagram could be labeled more completely, which may help distinguish the two different configurations: