Open the screenshot editor
Hover over the screenshot you want to zoom in on and click the pen icon in the toolbar at the top right of the image.

Switch to Crop mode
In the editor, click the Crop tool in the left toolbar. The right panel will now show a Zoom slider alongside the aspect ratio controls.

Adjust the zoom
Drag the Zoom slider in the right panel to zoom in or out (100%–300%). You can also click and drag inside the image to pan and re-centre the zoomed view on the area you want to highlight.
