SVEditor keeps track of any FIXME and TODOs it finds in your comments. As the source code is indexed (compiled) the location of any TODOs are found in your comments will be registered. To view the TODOs, you will need to open the Tasks view from Window>Show View>Other>General>Tasks.
Only tasks in files that are part of the index (included in an argument file) are included in the tasks lists. The comments are typically parsed when a project is first indexed, as a result the task list will only be updated when you rebuild your project (Project>Build).
Double clicking on an element in the tasks view will take you to that line in the source code.