If you need to change the same Arnold attributes on many nodes, use the Attribute Spreadsheet. For example, suppose you wanted to turn off the Opaque attribute on a number of objects in your scene. Here’s how to do it:

1. Select the objects.
2. Press the Down arrow (aka Pick Walk) to select the shape nodes.
3. Open the Attribute Spreadsheet.
4. Click the All tab, and find the Ai (Arnold) attributes you want to change. Drag across all rows, and then type “off” in the last row.