Pow ROI Zooming

To look more closely at a section of a graph, you need to pick a region of interest (ROI) for that graph. The current region of interest is shown by a blue box in the scope window. If there is no blue box, the ROI is an area large enough to display all of the elements (curves and images) of the selected graph and coincides with the enclosing black box in the scope.

There are four ways to change your region of interest:

  1. Right click (Command-click on MacOS) and drag in the scope to create a new ROI.
  2. Left clicking and dragging in the scope will "drag" the current ROI box. The main graph will be replotted using the new ROI when you release the left mouse button.
  3. Use the Zoom In,Replot,Zoom Out buttons. These create a new ROI half or twice as big in both directions as the current ROI, centered around the same point as the current ROI. Replot redraws the graph to show all its contents.
  4. Right click (Command-click on MacOS) and drag in the main POW window. If the ROI does not overlap the current graph (ie, you are dragging out an ROI on an unselected graph), the ROI selection will be applied to the top graph overlapping the ROI. If the ROI does not overlap any graph, the ROI will be applied to the current graph.
  5. Right double click (Command-double click on MacOS) in the main POW window or scope window. This will replot the graph and undo any previous zooming.