You can access the settings panel in the Chrome extension by clicking on the Mail Track for Gmail icon, in the Gmail interface.
Enabling Mail Track for Gmail
This button enables or disables Mail Track for Gmail tracker insertion, and notifications.
Choose the type of tracker
Allow you to select between the invisible and the visible tracker. The invisible tracker is a premium feature
Set Tracking by default
When activated, a tracker will be added automatically to each email draft created.
When a tracker is inserted, a notification message is displayed. If you want to remove the tracker or change the tracker type check this page.
Enable live notifications
When enabled, live notifications will inform you that an email has been opened, using Chrome notifications