In Thunderbird, you can adjust the duration of how long alerts stay on your screen before disappearing. Here's how you can change this setting: 1. Access Thunderbird Options: - Open Thunderbird and go to the menu located in the top right corner. - Select "Options" or "Preferences" from the menu. 2. Navigate to Thunderbird Options: - In the Options/Preferences window, find and click on the "General" tab on the left side. 3. Adjust Alerts Duration: - Look for the "When new messages arrive" section. - Here, you will find an option labeled as "Show an alert." - Next to this option, there should be a drop-down menu where you can select the duration of how long the alert stays visible on your screen. 4. Customize Alert...