For some activities, besides logging the duration, you may also want to log some other information. For instance, you track working time through a task "Project management". But you working for several clients at the same time and you want to know how much time you spend on each client individually. In this case, you can use a Drop-down tag Clients, in which you define clients as alternatives. So every time you log a task entry, you also mark one client. On Report page, you can later retrieve statistics of working hours aggregated by clients.
To create a Drop-down tag:
You can input "Company" in "Additional Text", and enter all clients you work on in the Options box, separated by enter. At last, you choose a default client.
Now you can assign this tag to task Project Management.
Now when you log task "Project management", the task entry will look like below, with the default client stored alongside of duration. You can then alter the client to record the specific client you are working for.
Later on, you can pull up working hours on each client in statistics.