The MODFLOW Options dialog box is used to
1.give a general description of the model (Description tab),
2.specify the units and other options of the model (Options tab), and
3.activate the wetting option and specify wetting related parameters (Wetting tab). The wetting tab is not visible if the Upstream Weighting package in MODFLOW-NWT is being used.
The MODFLOW Options dialog box is displayed by selecting Model|MODFLOW Options...