The LGR tab is on the Object Properties dialog box.
Models affected: By default an object will apply to both the parent model and all the child models. However, if you want an object to only apply to one or some of the models, the check boxes here can be used for that purpose. For example if the object is used to define a well, it could define it for the parent model, the child model or both.
Define boundary of child model: An object drawn on the top view of the model with zero Z formulas can be used to define the horizontal extent of a child model. The cells intersected by the object will define the edge of the child model. However MODFLOW-LGR does not allow the child grid to extend into the first or last row or column of the parent grid.
