[Zoom][View] menu

Shortcut
Toolbar: [Zoom Out] [Zoom Out] button
[Page Width] [Page Width] button
[Zoom In] [Zoom In] button
Keyboard: <+> key (Zoom in) / <-> key (Zoom out)
Use this command to display a page at a specified zoom ratio.
When you select this command, a check mark appears next to the zoom ratio.

[Fit to Page Width]

Fits the width of the page to the current window size, minus a 1 cm margin on both right and left sides.

[Fit to Page Height]

Fits the height of the page to the current window size, minus a 1 cm margin on the top and bottom sides.

[Fit to Whole Page]

Scales both the width and height of the page to fit into the current window.
Note
If you are using a wheel mouse, you can change the zoom ratio in steps of 10% by pressing the <Ctrl> key while turning the mouse wheel away from you (zoom in) or towards you (zoom out).