added info.

README.md

@@ -15,10 +15,49 @@ Then:
 ```
 git clone https://github.com/cyberalex4life/argos-indicator-nvidia-prime.git
 cd argos-indicator-nvidia-prime
+
+# copy icons
 cp -v icons/* ~/.local/share/icons/
+
+# copy 'nvidia-prime.r.2s.sh' to 'argos' folder
 cp -v nvidia-prime.r.2s.sh ~/.config/argos/
+
+# copy polkit policy in place
 sudo cp org.freedesktop.policykit.pkexec.prime-select.policy /usr/share/polkit-1/actions/
-sudo cp pkroot /usr/local/bin/
+
+# copy pkroot to '/usr/local/bin' and make sure it is executable
+sudo cp pkroot /usr/local/bin
 ```
+#### Uninstall
+```
+# remove icons
+rm ~/.local/share/icons-to-delete/{nvidia-active-symbolic.svg,nvidia-inactive-symbolic.svg,prime-indicator-intel.svg,prime-indicator-intel-symbolic.svg,prime-indicator-nvidia.svg}
+
+# remove policy
+sudo rm org.freedesktop.policykit.pkexec.prime-select.policy /usr/share/polkit-1/actions/
+
+# remove argos extension script
+rm ~/.config/argos/nvidia-prime.r.2s.sh
+
+# remove pkroot script
+sudo cp /usr/local/bin/pkroot
+```
+Then uninstall Argos if you don't need it anymore.
+
 **Note!**
-Further info to be added soon...
+To make the indicator ask for password you can either fully install
+['pkroot'](https://github.com/cyberalex4life/pkroot) or edit '**org.freedesktop.policykit.pkexec.prime-select.policy**' such that these lines:
+```
+<defaults>
+    <allow_any>yes</allow_any>
+    <allow_inactive>yes</allow_inactive>
+    <allow_active>yes</allow_active>
+</defaults>
+```
+look like this:
+```
+<defaults>
+    <allow_any>auth_admin</allow_any>
+    <allow_inactive>auth_admin</allow_inactive>
+    <allow_active>auth_admin</allow_active>
+</defaults>