# Column sorting—Summary Data Table

The columns sort when you click a column header. An arrow indicating the direction of sorting appears in the corner of the column header.

- The sort order is the selected column, and then the default sort order.
  - When viewing the data by visits, the default sort order is the visit sequence defined during the study design.
  - When viewing the data by sites, the default sort order is the alphabetical order of the site mnemonic.
- Any sort selections or highlights on rows are not saved after you display data with new sorting.
- When you sort a column, any cell that was marked as Incomplete is treated the same as a cell that contains no data.

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