Zoom allows you to magnify content to read websites with small text easily, or zoom out to see the whole webpage. Opera's zoom resizes all elements of the page, not just text.
To use it, go to the bottom-right of the window and click the Zoom (100%) button. Use the zoom slider to zoom in or zoom out. To return to the default setting, click the arrow to the left of the slide and select 100%.
Change the zoom settings
To change the default zoom level and automatically apply this to webpages, go toand select the default in the "Page zoom" field.