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Although it is written in Wiki, since machine translation is fucking, so I will write an outline here
(Top) Spanner (Wrench) tab:
(1) Hide tab-bar (Button row area) automatically
(2) Switching front/back of ▽ above the selected character
(3) Toggle displaying slider (meter) value
(4) Sound effect volume
(5) Sound effect in Stereo/Monoral
(6) Image quality
(7) Sensoring
(Bottom) Magnifier tab:
(1) Zoom 0 (100%) ~ 100 (500%)
(--) Change screen mode (only for offline version)
(2) Full screen mode
(3) Screenshot magnification 50%/100%/150%/200%/250%
(4) Screenshot (PNG)
(5) Screenshot (JPEG)
(6) Trimming