Apple Aperture 2 - Manual (Page 491)

Chapter 17 Exporting Your Images 491
IV
 Current Month
 Current Day
 Project Name
 / (slash)
You can specify a combination of name elements to create the custom folder names
you want.
You can also create a hierarchy of folders within folders. For example, you can specify
that Aperture place your images in a subfolder named Date, and within that folder you
can create subfolders identified by the time the image was taken. To create the folder
name format, you drag the elements you want into the Format field and drag the slash
element between the elements where a subfolder should be created.
To create a folder name format:
1 In the Export dialog, choose Edit from the Subfolder Format pop-up menu.
The Folder Naming Presets dialog appears.
2 Click the Add (+) button to create a new folder name format, or select the preset folder
name format you want to change.
3 Drag the name elements you want into the Format field in the order you want them.
4 Drag a slash between the elements where you want subfolders created.
5 Enter a custom name in the Custom Name field, if you want.
6 Click OK.
Your new folder name format now appears in the Subfolder Format pop-up menu.