The Diff Tool
The Diff Tool opens in a tab on the Web GUI after you have chosen two file versions to compare with the Diff Against command. Only text files may be compared using this command. The Diff Tool shows the two versions side by side in resizeable panes. The differences between the files are color-coded for visibility.
Links to the Web GUI URL used to generate the comparison between two file versions are shown at the top of the tab. This Diff Link contains a mailto link and a hypertext link.
The mailto link () opens a new email message (using your system's default email application) when you click it. The body of the email contains the URL. Recipients can click the link (after logging in to the Web GUI) and view that comparison. Note that the file's depot, stream and element ID are encoded numerically. Those numbers never change, so this link is permanent - it returns the same information no matter when it is used or what happens to those files later.
The hypertext Diff Link contains the same information as the mailto link, in a form useful for bookmarking. For security reasons, navigating to a bookmark saved from AccuRev will cause the Login dialog to appear if you are not logged in. After you log in, the URL's contents appear immediately in your browser.
The Diff Tool provides a toolbar with buttons for navigating file changes, as shown. The field after the buttons shows how many changes there are between the two files, and which one is currently being displayed.
The right side of the toolbar contains two buttons that toggle between 
Context Diff and 
Full Diff modes. Context Diff mode shows each change, including five lines of unchanged text above and below the change to provide context. Full Diff mode shows the entire file. The Diff Tool defaults to Context Diff mode for improved performance.