The Conditions tab for the Multiple File Properties dialog is the same as the Conditions tab for the File Properties dialog, except that two Apply method drop-down options have been added.
The apply method allows you to choose how you want the conditional expressions that you enter to be applied to the currently selected files.
Choose from:
None (leave existing conditions): This will not change the conditions for any of the currently selected files.
Replace existing conditions: This will replace the existing conditions for all of the currently selected files.
Prepend to existing conditions (AND): This will prepend the expressions to the existing conditions for all of the currently selected files, and AND them together.
Prepend to existing conditions (OR): This will prepend the expressions to the existing conditions for all of the currently selected files, and OR them together.
Append to existing conditions (AND): This will append the expressions to the existing conditions for all of the currently selected files, and AND them together.
Append to existing conditions (OR): This will append the expressions to the existing conditions for all of the currently selected files, and OR them together.