void tree_split(Con *con, orientation_t orientation);
/**
- * Moves focus one level up.
+ * Moves focus one level up. Returns true if focus changed.
*
*/
-void level_up(void);
+bool level_up(void);
/**
- * Moves focus one level down.
+ * Moves focus one level down. Returns true if focus changed.
*
*/
-void level_down(void);
+bool level_down(void);
/**
* Renders the tree, that is rendering all outputs using render_con() and