This is R2013a. Now I tested something new (to me): the   tstool.   However, the zoom and pan button are very similar. Code from documentation:
    load count.dat;
    count1=timeseries(count(:,1),1:24);
    count1.Name = 'Oak St. Traffic Count';
    count1.TimeInfo.Units = 'hours';
Obtain time of maximum value and add it as an event:
    [~,index] = max(count1.Data);
    max_event = tsdata.event('peak',count1.Time(index));
    max_event.Units = 'hours';
    
    count1 = addevent(count1,max_event);
    
     tstool( count1 )