The Zoom tool enables you to zoom into the image. Clicking on the Zoom tool will immediately zoom into the zoom value selected (100% by default).
After zooming into the image, the Navigator will be displayed which enables you to click and pan on a bird’s eye view of the image.
To change the zoom state, click on the drop down menu next to the Zoom button and select another zoom ratio.
Shortcuts
Zoom: Spacebar
Pan (after zooming): Press and hold the spacebar
Zoom In: Ctrl (Windows) / Command (Macintosh) + ‘+’
Zoom Out: Ctrl (Windows) / Command (Macintosh) + ‘-’
Zoom to 100%: Ctrl (Windows) / Command (Macintosh) + Alt (Windows) / Option (Macintosh) + 0
Zoom to Fit: Ctrl (Windows) / Command (Macintosh) + 0