To move quantity from bin-to-bin, create an New Qty Adjustment, select the account and check 'Only adjust in NumberCruncher'. Next select your item and click the arrow under the 'Details' column, then select Bins (or Lot/Serial # if you item is also serialized). This will open the Enter Bins screen. Select the Bin you want to transfer from then enter a negative qty. On the next line enter select the Bin you want to transfer to then enter a positive quantity. Press Save & Close when finished which will bring you back to the Quantity Adjustment.
Note the net quantity adjusted is 0 which is correct because the adjustment has not financial implications.