Panning

Select the Pan tool from the Note Toolbox to click and drag the score.

Even if the Pan tool is not selected, you can click and drag the score with the middle mouse button to pan at any time.

In addition, when the current tool is among selection tool and note tools, if there is no any operation resulting from left click, you can drag the score to pan.

Zooming

Select the Zoom tool from the Note Toolbox, then use the mouse wheel or click/Ctrl+click to zoom in and out.

There is a zooming bar below at the bottom. You can select a zooming menu item or drag the bar to change zooming scale. Fit to View will calculate zooming scale to let the score page width fit the view width.