Beamer
    
            
                
                    A LaTeX class for producing presentations and slides
                
            
             
            
             
            
        
            ... by a template system. Many of the elements of slides can be adjusted by setting simple key-based values in the preamble. More complex changes can be implemented by altering specific, targeted definitions without needing to rewrite entire blocks of code. This allows a variety of visual appearances to be selected for the same content source.