Select the Quick tab of the 3D Custom Function Plots dialog to specify the custom function to plot in your graph.
Name. The name of the function (if one is given) will be displayed in this field. To create (and name) a new function, enter a function in the Function box, then click the Add to List button.
Range. Use the boxes in this group box to specify the range for the custom function.
X Min, X Max. Specify here the range (i.e., minimum and maximum values) of the X variable for the custom function.
Y Min, Y Max. Specify here the range (i.e., minimum and maximum values) of the Y variable for the custom function.
Function. Enter the function you want to plot in this box. Note that as you type, a menu with possible characters or functions will appear. You can choose from any item on the menu, or type the function yourself. If you want to save this function for later use, you must add it to the function field in the Function Name Manager by clicking the Add to list button. It will not be automatically added. See user-defined functions for more details.
Add to list. If you want to create a function which can be saved and reused at a later time, click the Add to list button. The New Style dialog will then be displayed, in which you can specify a name for the function. The function can then be selected from the Function Name Manager and edited (see Function List).
Function list. Click the Function list button to display the Function Name Manager, in which you can create a new function and to edit, rename, or delete an existing function.