Merge Input History
The Merge Input History for a particular file indicates which sessions of data have been merged into that file. To view the Merge Input History for a file, use the Properties tool button on the toolbar or the Properties command under the File menu to display the Properties dialog. In the Properties dialog, select the Merge Input History tab to bring this tab to the front.
The input history is listed per file rather than per session. Therefore, although a merged file may bring in more than one session of data in the process of being merged to a target file, only the source file (i.e., the merged file) would be listed on the Merge Input History tab. To view the individual sessions of data imported with a merged data file, select the merged data file on the Merge Input History tab and click the Details button. The individual sessions of data included within that merged file (and therefore merged into the target file) will be displayed.