For each problem, the software stores a history of relations defined in the Graphs application and 3D Graphing view, such as function graphs f1 through f99 and 3D function graphs z1 through z99. You can view and edit these items using a button on the entry line.

Viewing the History

1.

Press Ctrl+G to show the entry line.

2.

Click the History Menu button  on the entry line.

The menu is displayed. As you point to the name of each item, its expression appears in the entry line.

3.

Select the name of the relation you want to view or edit.

4.

(Optional) From the entry line, use the up and down arrow keys to scroll through the defined relations of the same type.

Viewing the History of Specific Relation Types

Use this method if you want to view or edit a defined relation that does not appear in the History menu.

1.

On the Graph Entry/Edit menu, click the relation type. For example, click Polar to show the entry line for the next available Polar relation.

2.

Click the History Menu button , or use the up and down arrow keys to scroll through the defined relations of the same type.