Adding the first Access Control List entry creates the Access Control List.
In File Manager, select the icon of the file or folder whose ACL you want to modify.
The Permissions dialog box appears.
Click Show Access Control List if the ACL portion of the Permissions dialog box is not visible.
Click the Add button.
The Add Access List Entry dialog box appears.
Select an option from the Type option button.
Enter the name associated with the chosen Type, if it has one in the Name field.
Click the Permission check boxes to reflect the values you want for the new ACL entry.
The status line at the bottom of the dialog box informs you if the permissions you request are restricted by the mask.
Click Add in the Add Access List Entry dialog box.
Use the Apply Changes To option button to choose the scope of the change.
For files, the options are This File Only (default), All Files in Parent Folder, and All Files in Parent Folder and its Subfolders. For folders, the options are This folder only (default) and This folder and its Subfolders.
Click OK to apply the current settings and dismiss the dialog box. Click Apply to apply the settings without dismissing the dialog box.