Grid Component - Grid Methods - .showGridColumn() Method
A new method has been added to the Grid object that allows you to dynamically show/hide columns in the Grid. The method takes two arguments: the name of the Grid column (which is the field name of the field shown in the column - with spaces in the field name replaced with underscores), and a flag which is true or false, depending on whether you want to show or hide the column.
The following example hides the 'Address' column in the Grid. Notice that the grid column name must be UPPER CASE.