Normally one dataset is examined at a time, but it is possible to add or subtract multiple files. This drop-down menu allows you choose the number of files to be summed, from 1 to 11 (default 1). If the number is changed, the number of "open file" dialog boxes changes. After selecting the appropriate number of files, choose each file to be summed using the appropriate Browse button, then click Open Files to read and sum the files. |