The What list lets you choose which data you want to export. Depending on the data format, you can export an entire survey or select points or selected traverses.
Export the entire survey. If the export type supports just points, just the survey points will be exported. If the export type supports traverses, all the traverses will be exported.
If you have opened a traverse view or have otherwise selected a traverse, one of the options in the What list will be to export that entire traverse.
When appropriate, the What list includes selected and tagged items in the open views. To export certain traverses, open the Traverses Manager and select those traverses. The open the Export dialog and choose Selected Traverses from the What list.
COGO Commands - reference