+ static void set_snap_delta_modifier (guint);
+ /** @return Modifier mask to temporarily toggle between relative and absolute grid setting.
+ * Absolute grid is for aligning objects with the grid lines.
+ * Relative grid is for maintaining an initial position relative to the grid lines.
+ * With this modifier:
+ * - magnetic or normal grid should snap relative to an initial grid offset
+ * - no grid should snap relative to the grid.
+ */
+ static ModifierMask snap_delta_modifier () { return ModifierMask (snap_delta_mod); }
+