-/* Create on the terminal "screen" an empty WinMeta whose virtual screen at the
- * beginning is sized just like the terminal screen. Note that emptiness is
- * marked by WinMeta.chain_start=0. Other struct values are also initialized 0.
+/* Initialize empty WinMeta "wmeta" on the terminal "screen". Note that
+ * emptiness is marked by WinMeta.chain_start=0. Other struct values are also
+ * initialized 0, except for the virtual screen (terminal screen height, width =
+ * 1) and its terminal-sized frame.