Note: With the release of Origin 8.6, zooming, panning and rescaling of X and Y axes features can be directly accessed through the Zooming-and-Panning and Rescale Tool toolbars.
To install, download the OPK file, and just drag-and-drop the OPK onto the Origin interface. The toolbar will be available when a graph (layer) is active.
The first two buttons are copies of the "zoom in" and "zoom out" buttons from the Tools toolbar, placed here just for convenience. These can be usexd to zoom into a part of the data, and then the other buttons to the right can be used to further zoom and scroll. The last button is a copy of the "Rescale" button from the Graph toolbar which rescales both X and Y.
To uninstall, select Tools->Uninstall OPK Files, and select Scroll.