• The buttons under the graph allow various manipulations of the graph coordinates.
• The text input fields for functions can accept a wide variety of expressions to represent functions.
• For each surface, there are four input fields which specify bounds on the variables for the graph:
  • The variable s takes values between s_min and s_max, specified by the fields marked "s_min=" and "s_max=".
  • The variable t takes values between t_min and t_max, specified by the fields marked "t_min=" and "t_max=".
  • The text input fields for s_min, s_max, t_min, and t_max, can accept any decimal number input.
• For another way to view surfaces, try the "wireframe" representation.

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