Sneaked in a few last minute bug fixes for table mode.

config/keyboard/Readme.md

@@ -76,8 +76,13 @@ Both layouts use **Fenrir+F** for settings, **Fenrir+H** or **Fenrir+F1** for
 the tutorial, and **Fenrir+Control+S** to save settings. The tutorial describes
 loaded shortcuts and lets you browse unbound commands.
 
-In table mode, word navigation moves between cells. **Fenrir+X** selects the
-current row as headers. Outside table mode it places a text-selection mark.
+In table mode, word navigation moves between cells. Numeric tables can use
+visible headers automatically. Review starts at the first data cell when a
+recognized table is at or immediately above the application cursor.
+**Fenrir+X** selects the current row as headers,
+overriding automatic selection. **Fenrir+Control+Shift+X** clears headers and
+disables automatic selection until table mode is re-entered or the screen
+session changes. Outside table mode, Fenrir+X places a text-selection mark.
 
 See the [user manual](../../docs/user.md) for clipboard, reading-region,
 spellcheck, and menu workflows.