how do I check previous on screen messages on iphone

 To view past on-screen messages (notifications) on your iPhone, you can access them through the Notification Center. Here's how:

1. Accessing the Notification Center:

• On the Lock Screen: Swipe up from the middle of the screen.
• On other screens: Swipe down from the top center. 

2. Viewing Past Notifications:

• Once the Notification Center is open, you can scroll up to see older notifications, if they are available.
• You can also scroll through the notifications to find specific ones or those you may have missed. 

3. Viewing Notifications on the Lock Screen:

• You can also view notification previews on the Lock Screen by going to Settings > Notifications > Show Previews and selecting "Always". 

Important Notes:

• Notifications are generally grouped by app for easier viewing. 
• Some notifications may offer quick actions when touched and held. 
• If you have deleted notifications, they won't be viewable in Notification Center. 
• If you have a recent iPhone update, you may need to go to your Lock Screen and swipe up from the bottom to view past notifications.