To add or edit a file's description in the Documents tab.
Go to the Company level or Project level Documents tab.
Navigate to the file you wish to edit or add a description to using the left hand file tree.
Click on the blue pencil icon next to the 'Description' field.
Add or edit a description. (Note: You have unlimited characters, but best practice is to keep it short so that it fits on your window.)
Click anywhere in Procore to save the description.