feh(1): Document --zoom max/fill

.It Cm -v , --version

output version information and exit.

.

.It Cm --zoom Ar percent

.It Cm --zoom Ar percent No | Cm max No | Cm fill

Zoom images by

.Ar percent

when in full screen mode or when window geometry is fixed.  When combined with

.Cm --auto-zoom ,

zooming will be limited to the specified

.Ar percent .

Specifying

.Cm fill

is like setting

.Cm --auto-zoom ,

using

.Cm max

makes feh zoom the image like the

.Cm --bg-max

mode.

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.El

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