To Create a Mask Channel

  1. Select (highlight) the header of the next available channel in your database. Click the right mouse button and select New from the popup menu. The Create Channel dialog is displayed.

  2. Type the Name of the new channel, and in the Class parameter box type "MASK". This will identify this channel as a mask channel and will enable the channel to be displayed in all Mask drop-down lists available in the Geochemistry system.

  3. Ensure that the Mask channel is not protected, as you cannot write to a protected channel.