diff --git a/dot/file/profile b/dot/file/profile
index ca09065..82d1ee1 100755
--- a/dot/file/profile
+++ b/dot/file/profile
@@ -2,10 +2,22 @@
 #
 # Profile of Surdeus.
 #
+
+
+# The main configuraton for each PC via the env directory.
+export ETC="$HOME/etc"
+export ENVDIR="$HOME/env"
+export SETENV="$ETC/setenv/sh" 
+test -r "$SETENV" && . "$SETENV" && setenv profile
+
 reload-profile(){
 	. $PROFILE
 }
 
+use-nvidia(){
+	. $ETC/script/use-nvidia.sh
+}
+
 no-output() {
 	$@ &> /dev/null
 }
@@ -77,7 +89,6 @@ fi
 	export APP="$HOME/app"
 	export BIN="$HOME/bin"
 	export LOAD="$HOME/load"
-	export ETC="$HOME/etc"
 	export PATH="$PATH:$BIN"
 	export GIT="https://surdeus.su"
 	export DEV="$HOME/dev"
@@ -95,8 +106,6 @@ fi
 	export CMDHIST="$ETC/cmds" 
 	export CMDHISTMAX="100"
 	export PROFILE="$HOME/.profile"
-	export ENVDIR="$HOME/env"
-	export SETENV="$ETCsetenv/sh" 
 	export LOGIN="$ETC/login/sh"
 	export INDENT="	"
 	
@@ -171,7 +180,6 @@ export PATH="$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/tools/bin:$ANDROID_HOME/pla
 #export PATH="$PATH:$ANDROID_SDK_HOME/cmdline-tools/*/bin"
 
 source-if-exist "$ETC/script/lf.sh"
-test -r $SETENV && . "$SETENV" && setenv profile
 
 # Visual editor.
 ve(){
diff --git a/script/use-nvidia.sh b/script/use-nvidia.sh
new file mode 100644
index 0000000..c9f9dcb
--- /dev/null
+++ b/script/use-nvidia.sh
@@ -0,0 +1,3 @@
+export __NV_PRIME_RENDER_OFFLOAD=1
+export __GLX_VENDOR_LIBRARY_NAME=nvidia
+export __VK_LAYER_NV_optimus=NVIDIA_only