You can navigate to the next annotation by pressing Ctrl+. and to the previous ony by pressing Ctrl+,. Out of the box not all available annotation types are included in that navigation, e.g. breakpoints are not part of it. Breakpoints and other annotation types can either be enabled via the Next Annotation toolbar button drop-down menu or by checking Include in next/previous navigation on the General > Editors > Text Editors > Annotations preference page.
Navigating to an annotation lets its text appear in the status line. The next section explains how to read the status line under Windows.
Some annotation types like e.g. warnings and errors, can be accessed by pressing F2 after having navigated to one of them or setting the caret inside the annotation.
Accessibility features in Eclipse
Navigating the user interface by using the keyboard
Accessibility preference page
Font and color settings in Eclipse