When you first create a layout page, Prism asks you to choose an arrangement of placeholders. But you are not stuck with this arrangement. You can always go back to the Format Layout dialog by clicking its toolbar button, or dropping Change and choosing Arrangement of graphs.
If you assign the wrong graph to the layout, it is easy to replace. Just double-click on that graph (in the layout) and choose its replacement. Or drag the name of the replacement graph from the Navigator and drop on to the graph you want to replace.
It is easy to add a new graph to the layout. First resize and move graphs to make space for a new one. Then do any of the following (the first two choices are the simplest).
•Drag a graph from the Navigator and drop onto a blank spot on the layout page. Don't drop too close to an existing graph or you might end up replacing that graph rather than adding a new one.
•Go to the Graphs section of this project or any other, and copy a graph to the clipboard. Then go to the layout, and paste.
•From the layout, drop the Insert menu and choose Prism Graph. Then choose the graph you want to add to the layout.
•From the layout, bring up the Format Layout dialog (by clicking its toolbar button, or dropping Change and choosing Arrangement of graphs) and choosing to add another graph to the layout.