diff --git a/Launcher-documentation-WIP.md b/Launcher-documentation-WIP.md
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+Launcher_SetScreen
+
+- only one Screen can be active at a time
+- a Screen is composed of widgets
+
+LScreen
+- Init (required
+- Show (optional
+- Free (optional
+
+
+How a launcher screen works
+
+Init
+Showing
+
+Widget layout
+
+Background drawing
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