Campbell Scientific PC400 Datalogger Support Software - Manual (Page 53)

Section 5. Split
In this example we want the hourly data (note the Output Interval at the bottom
of the Data File Label window), so click array 60. To paste the desired values
from this array into the Select box, select the field names while holding down
the <ctrl> key. All of the values could be selected by clicking the first one and
holding the mouse button down, and dragging to the end. Once the values you
want have been selected click Paste.
5-5