The main displayed object in POW is a graph. A graph is defined by a list of curves and images that belong to it. When a graph is selected (by clicking anywhere within its bounds) a thumbnail version of the whole graph will be displayed in the scope window at the upper right showing all of the curves and images that belong to that graph. The displayed version of the graph, in the main POW window, lower left, will only display those members of the graph that fall within the X and Y ranges for the current region of interest.
The most important thing to remember when using pow is that all actions, such as dragging out a region for GTI selection in Xselect, or choosing a region of interest to zoom in on refer to the currently selected graph. The currently selected graph is surrounded by a yellow box in the main POW window, it is displayed in the scope window, and its name is shown in the yellow box above the scope. So remember to click on the graph you're interested in before dragging your mouse.
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