In Origin 8.6, you can use the mouse and scroll wheel, or use the keyboard, to zoom and scroll inside a graph layer, in either X or Y direction.
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Drag red dot on axis or Press Z/X key + drag layer boundary to Adjust Axis Begin and End
Multiple ROI and Enlarged Graphs
Zoom and Pan Graph with Hotkeys to examine details in data
Hot Keys to Zoom in 3D Graphs
Origin 3D OpenGL Graphs
Zooming and Panning