All members can view a grid’s description: simply click on the information action button on the opened grid’s action bar.
An architect or builder can edit a grid’s description.
First, ensure you are in edit mode, by clicking the edit mode action button from within the grid action bar. When edit mode is toggled on, click on the information action button from within the grid action bar. You can now update the grid description by clicking inline within the descriptive text area. Changes are automatically saved.