Canvas functionality is a new technology from salesforce.com for force.com platform. This functionality allows direct communication between salesforce’s visualforce pages and third party applications. Browser does not allow to communicate between pages from different domain by default as it is security issue. Canvas from salesforce.com allows support such type of communication, what is its advantage. [...]
This solution allowed the finance department of our client to view future recognized revenue in an interactive user interface. Various past and future time periods were accessible via easy to navigate dropdowns, allowing finance users to rapidly assess sales performance (e.g. Opportunity data) for reporting back to the chief revenue officer.