The following objects can be zoomed in JAGUAR:
Pressing the "+" or "-" key increases or decreases the current SPAN (spectrum width) with two exceptions:
On all other displays +/- change the horizontal spectrum size, up to max 50 kHz. The smallest range (0.025 kHz) is useful when doing exact offset measurements.
In addition to +/- you can also use SLIDER > ZOOM for increasing/decreasing the display range or just move the mouse cursor to the bottom area of SPECTOR (the red offset flag appears to cursor) and scroll using the mouse wheel and/or left/right arrow keys.