If multiple cells are selected that all have the same edit control type, they can all be modified simultaneously by displaying a popup window containing the common edit control and applying the submitted value from the edit control to all selected cells.

If the cell edit type is an ordered type, include options in the popup dialog to increase or decrease the selected cell values by the entered value, or to set the cell values to the entered value (default).

Note that the increase/decrease/set options should not be bound to keys that the edit control might use for editing values. For instance, don't bind increase/decrease to /- keys as a particular edit control may treat these characters as part of valid values (e.g. 102-16). A good alternative would be to use the up/down arrow keys to submit increase/decrease.