This screen allows you to choose which attributes you want to change for the selected files. This is a quick way of changing the basic attributes on a bunch of files in one action. Here you could mark files ReadOnly, Hidden, System or Achive - or clear those attributes!
Each check box can have three states.
Checked - Set that attribute on the file(s)
UnChecked - Clear that attribute on the file(s)
GreyCheck - Do not change attribute on the file(s)
