Mention about the graphical reports in Bugzilla?

A group of line, a bar or Pie Charts is referred to be as graphical reports they are very helpful in order to perform a number of functions. For example, if any of the users want to know about the component which has the maximum number of defects and want to represent it in a graph then they collect it from the options like-

• Severity on x-axis
• Component on y-axis