Multiple columns can be sorted in a grid. If you have a column selected for sorting, you will see a green circle above the Sort. The sorts are performed in the order they are applied.
You can clear the sort by clicking on the column (one click sorts in ascending order, two clicks sort in descending order, and the third click clears the sort). You can also clear the sort from the Sort link at the top of the grid. Click the 'X" for the row you wish to remove the sort and then click Apply
