FujiFilm X100T Owner's Manual page 150

[AUTOFOCUS SETTING]
If [ON] is selected, a second focus frame for focus distances of about 50 cm (1.6 ft.) will be
added to the display in the optical viewfinder. The focus frame for the current focus distance is
displayed in green when the shutter button is pressed halfway.
ON
OFF
Focus frame for focus distance of infinity
Focus frame for focus distance of about 50 cm (1.6 ft.)
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