Block Threading Load Functions - allow you to select the threadings for 
                                      each of the block threading units.

Process - 1. Enter or Load Block Threading ( can be saved)
          2. Choose this function 
          3. Make or Load a threading for each block unit. 
          4. Click on CONVERT to substitute threadings for units.
          5. Click on FINISHED and the threading or Short Draft Threading
              can be saved.
 Note : The threading file names will be saved with the 
        Short Draft Threading ( if selected).
      : The CONVERT gadget works only when all threadings selected.

UNIT - Letters represent the threading unit in the Short Draft.
DONE - An X is displayed when the threading unit is in memory.
MAKE - Click on symbol to make the threading for the unit.
LOAD - Click on symbol to load the threading from your disk.
FILE NAME - Displays the file name if threading has been loaded.
THREADS - Displays the number of THREADS in the selected threading.