View Table/Column Comments and Default Value in Model

Not to suggest copying something I saw in another data modeler, DbSchema (http://www.dbschema.com/index.html) has the ability to view the default values and comments of each column within the data model by mousing over the column causing a pop-up to display with the information. If not wanting/able to emulate this functionality, would there be a way to allow users to "set" the data model to display this information? Thanks!