Add sequence_timeout to README

README.md

@@ -483,11 +483,19 @@ are a workaround and wouldn't be required if there were resize-events.
 
 #### The focus section
 
-In the `[focus]` section, you can configure the amount of time a window has to
-keep the focus in order to affect the LRU order, the `lockin_delay`.  If a
-given window is only briefly focused, e.g., by moving the mouse over it on the
-way to another window with sway's `focus_follows_mouse` set to `yes` or
-`always`, then its position in the LRU order will not be modified.
+In the `[focus]` section, you can configure how focus switches affect the LRU
+order.
+
+* `lockin_delay` determines the amount of time (in milliseconds) a window has
+  to keep the focus in order to affect the LRU order.  If a given window
+  is only briefly focused, e.g., by moving the mouse over it on the way to
+  another window with sway's `focus_follows_mouse` set to `yes` or `always`,
+  then its position in the LRU order will not be modified.
+* `sequence_timeout` may specify an amount of time (in milliseconds) such
+  that a sequence of next-/prev-window commands is considered finished
+  when such time elapses after the latest command is executed, even if no
+  unrelated swayr command is received.
+
 
 
 ### <a id="swayr-version-changes">Version changes</a>