Using the Zoom pop-up menu
Above the vertical scrollbar to the right you can find a pop-up menu allowing you to set the zoom factor.
By zooming in you can make detailed adjustments to symbols, etc. By zooming out you get a better overview.
If you select “Fit Page”, the zoom factor is adjusted according to the window size so that the whole page becomes visible.
If you select “Fit Width”, the zoom factor is adjusted according to the window width so that the full width of the page becomes visible.
Note
This pop-up menu can also be opened by right-clicking in the ruler.