In a matter, you can add or remove panels from your matter homepage.
For messaging, we currently have a panel for "Recent Emails". Within Actionstep, we also have a feature for "Recent Phone Calls". Currently, there isn't an option to add a panel for "Recent Phone Calls" to your matter homepage.
We are always open to feedback! If you feel like this would be a beneficial feature for Actionstep, you can always submit a feature request to our support team at firstname.lastname@example.org