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                display
              
                A display.
              
                :result-type
              
                The type of sequence to return.
             
              Returns or (with setf) changes the mapping of button 
              numbers for the display pointer. The :result-type 
              is not used when changing the mapping. If element i of 
              the mapping sequence is j, then the events from pointer 
              button j are reported by the server as events for button 
              i+1. (Note that pointer buttons are numbered beginning 
              with one, while the mapping sequence itself is indexed normally 
              from zero.) If element i of the mapping sequence is 
              zero, then button i+1 is disabled and can no longer 
              generate input events. No two elements of the mapping can have 
              the same non-zero value.
             
              The length of the mapping sequence indicates the actual number 
              of buttons on the device. When changing the mapping, the new 
              mapping must have this same length.
             
              
                mapping
              
                Type sequence or card8.
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