Tap on the zoom tool on the Write mode for a more accurate way of writing in zoom mode. Alternatively, you can also use 2 fingers then pinch and expand the page to zoom-in.
Zoom advance settings
Long press on the Zoom tool to see its advanced options:
b.1.) None - Choose "None" to move manually the zoomed area to continue writing.
To move around when on zoom mode, just tap on the arrow tools as indicated in the screenshot below.
To exit from zoom mode, just tap on the Exit tool.