The API Tools view shows all deltas found between a set of selected elements (project, source folders,
package fragments, or compilation units) and a reference baseline. TheAPI Tools view is available under 
Window > Show View > Other... > API Tools > API Tools
. 

The view itself is showing only the delta's localized message with an overlay image that tells whether the corresponding delta
is seen as a compatible ( ) or an incompatible 
(
) or an incompatible 
( ) delta.
) delta.
A double-click on a delta shows additional information inside the property view.
The additional information are: