Can I do customizations in a list report applications? Like adding a view and a controller?

[DhruvKumarSingh]

I have a requirement where I have to make changes in a List report application and I have to do that without annotations. Is it possible to add views and controllers in a List report application? Or Do I have to use flexible programming based approach only.

[mauriciolauffer]

Yes, you can make some changes without annotations. Not sure whether your use case is covered, but have a look at:

Configuring List Report Features and Extending List Reports and Object Pages Using App Extensions.