Global USE flags

Flag	Description	Packages
fcitx	Set IME environment variables for fcitx in desktop file.	2
ibus	Set IME environment variables for ibus in desktop files.	2
systemd	Use systemd's D-Bus library instead of the bundled libdbus	2

Local USE flags

app-misc

bcompare

Flag	Description
caja	Install the Caja extension.
kde	Enable the KDE Plasma 6 context menu extension.
nautilus	Install the Nautilus extension.
nemo	Install the Nemo extension.
thunar	Install the Thunar extension.

app-text

goldendict-ng

Flag	Description
epwing	Enable EPWING dictionary support
ffmpeg	Enable FFmpeg-based media playback support
zim	Enable ZIM archive support

dev-util

datagrip

Flag	Description
wayland	Enable experimental Wayland support in JetBrains Runtime.

net-im

wechat

Flag	Description
bwrap	Use <pkg>sys-apps/bubblewrap</pkg> to reduce filesystem exposure and limit privacy leakage.

net-misc

xrdp

Flag	Description
fuse	Enable FUSE support for clipboard file and drive redirection.
imlib	Enable image support via imlib2.
ipv6	Enable IPv6 support.
jpeg	Enable JPEG support.
mp3	Enable MP3 support via lame.
opus	Enable Opus audio codec support.
pam	Enable PAM authentication support.
x264	Enable H.264 support via x264.

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