Zooming and Scrolling in Graphs

If zooming and scrolling has been enabled for a graph, then the graph includes a Zoom icon. The zoom icon enables you to zoom in and out of a graph's plot area using its axes. Once you zoom in on an axis, you can scroll the axis.

To enable zooming and scrolling in a graph, the content designer sets the zoom and scroll properties in the "Graph Properties dialog: General tab."

When you zoom in on an axis, a zoom and scroll slider is displayed. Figure A-3 shows an example of a zoom and scroll slider.

A zoom and scroll slider consists of the following components:

• Left or bottom button — Scrolls to the left on the X axis or to the bottom on the Y axis, revealing portions of the graph that are out of view.

• Right or top button — Scrolls to the right on the X axis or to the top on the Y axis, revealing portions of the graph that are out of view.

• Scroll thumb — Represents the visible portion of the graph in relation to the full graph. You drag the scroll thumb to dynamically scroll the graph, revealing portions of the graph that are out of view.

• Resize handles — Are displayed at each end of the scroll thumb when you hover over the thumb. You use the resize handles to zoom in and out on an axis.

• Tooltip — Is displayed only when a you hover over either the thumb or a resize handle and describes the data that is currently displayed in the scroll thumb.

To zoom and scroll in a graph:

1. Hover the mouse over the graph to display the Zoom button.

2. Click the Zoom icon and then:

   • If only one axis has zoom and scroll enabled, then select either Zoom In or Zoom Out.

   • If both axes have zoom and scroll enabled:

     • To zoom in and out and scroll on the X axis, select Horizontal Axis and then either Zoom In or Zoom Out. A zoom and scroll slider is displayed on the X axis.

       To unzoom the X axis and display the actual graph size, select Actual Size.

     • To zoom in and out and scroll on the Y axis, select Vertical Axis and then either Zoom In or Zoom Out. A zoom and scroll bar is displayed on the Y axis.

       To unzoom the Y axis and display the actual graph size, select Actual Size.

   • To unzoom both the X and Y axes and display the actual graph size, select Actual Size.

3. Once you have zoomed in or out, zoom and scroll as desired by:

   • Using the Zoom button to zoom in and out incrementally

   • Dragging the scroll thumb on an axis to dynamically scroll the graph, revealing portions of the graph that are out of view

   • Clicking the scroll buttons on an axis to scroll left and right (on the X axis) or up and down (on the Y axis)

   • Using the resize handles to zoom in and out on an axis