Zooming in Sparky

From NMR Wiki

The following commands can be used for zooming in Sparky.

Before you can zoom - you will need to select a spectrum to zoom by clicking inside it's window.

zf - zoom full
zo - zoom out
zi - zoom in
zp - zoom previous

Related: vt - opens window where you can adjust width/height ratio

Also you can zoom with the mouse if zoom pointer mode is selected - either by pressing F11 (won't work on Macintosh) or selecting corresponding checkbox in menu shown below (View->Pointer modes...)