Make sure you have most recent copy of Igtools (Dropbox/DAG/Sources/Igtools)

1) After opening MATLAB

 EditorMacro('Alt-Control-h', @createHeaderComment_dag); 

Alternatively, add the above command to startup.m

2) PRESS Alt-Control-h while in MATLAB Editor (new or existing file)

This will add documentation template:

Thanks to:

Yair M. Altman

http://www.mathworks.com/matlabcentral/fileexchange/24615-editormacro-assign-a-macro-to-a-keyboard-key-stroke-in-the-matlab-editor-and-command-window

http://undocumentedmatlab.com/blog/editormacro-assign-a-keyboard-macro-in-the-matlab-editor