Graph Operations
This section describes manipulations of graphs already created. Read about the GRAPH mode in "Calculator Operations" if you want to learn on how to create graphs.
The graphing interface has been designed under the principle of minimizing the number of buttons, menus, etc. controls, and utilizing various touch gestures instead. The following gestures are recognized:
Pan = translate an entire graph
Grab the graph with TWO fingers and move it in a desired direction. (One finger pan is reserved for Tracer operations - see below.)
Pinch = scale graph in vertical, horizontal, or both directions
Pinch the graph with two fingers in 1) vertical direction to scale only the Y axis; 2) horizontal direction to scale only the X axis:
Pinch the graph with two fingers at about 45 degrees to scale both axes:
Single tap = turn the Tracer on
Tap the graph one time and with one finger to turn the Tracer feature on. Tracer will display your formula value at the tapped point.
Pan = move the Tracer
Pan with ONE finger to move the Tracer left and right.
Double tap = turn the Tracer off
Copy button
This button copies the currently displayed graph as an image that can be pasted into other applications (e.g., Mail).
Save button
This button saves the currently displayed graph as a "photo" image in the iPhone's Photos album.