How do I add columns to task views (or activities views)?

Hello,

I would like to create a task list for call center agents who do outbound calls.

They need to see a list that contains CUSTOM COLUMNS such as Contact/Lead NAME and PHONE NUMBER, REMARKS, as well as DUE DATE.

How can I add these columns to the TASK view (or "activities" view)?

Or should I rather design a "REPORT"?

Best regards