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:
- Right click (Command-click on MacOS) and drag in the scope to create a new ROI.
- 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.
- 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.
- 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.
- 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.