To sort the sample list, either choose the "Sort Sample List..." item under the "Workspace" menu, or double click in the first column of the header bar (between the group and sample lists). This brings up the dialog shown below.

From this dialog, you can choose from a variety of different keys on which to sort. If you select more than one key, then the list is first sorted on the first key; then, for all samples that have the same value of that key, they are sorted on the basis of the second key; and so forth. The sample list is sorted identically for all groups.

Note that you do not have to display the key values in the workspace to sort on them. For more information about the possible keys that you might see in the selection list, click here.