How to capture tasks that do not appear in the project plans?

Often the coders and testers are given small odd jobs, or called to meetings that eat away their time.
If such time is not accounted in ProjeQtor, it looks as if they are wasting their time doing nothing.

Is there a feature where the coder or tester can add their own work and show how much work he has done?
Ideally, he should be able to show dependencies of his job to the other tasks in the project.

Also, sometimes he is given a job for which a project does not exist.
What is the best practice to handle this?