Administrators can share Documents with specific Accounts. Select a Document. Click the Share button in the top right corner of the Document Detail page (Arrow). This will bring up a pop-up window.
To Share a document, select an Account from Share with Others drop-down box (Arrow 1). Choose a Group from the Share with a Group drop-down box to select from a list of groups (Arrow 2). Choosing a Group will grant editing permissions to all Accounts within that Group. When you have finished editing permissions to your satisfaction, click the Done button. Choose Cancel to cancel your edits.