30.2.8.4 Zooming in and out on pages
The following functions are only available in the page view since you can only zoom in or out on a page there.
You can use go_zoom&zoom=x to change the display continuously. Values between 0.1 and 1 (10 to 100 percent) are possible for x.
You use go_zoom&zoom=0 to display the page in accordance with the available screen area.
You can also use go_zoom_in and go_zoom_out to zoom in or out on the document depending on the current view.