On almost every activity form, there is a small vertical arrow at the top left in the title bar. Clicking it allows you to select a new activity type from the available ones and start editing the activity right away.
Example 1
Suppose that you have created a task, "Please write an email to Mr. Doe containing the following: ....", and have delegated it to a colleague.
Then the colleague who receives this task can deal with it by simply changing the activity type directly to an outgoing email without
- composing a new email and
- having to close the delegated task.
Tip: If the task’s Subject corresponds to the email’s subject, and the addressee has already been set in the For contact field, then it is even more convenient for the colleague to quickly create the email.