Create a Popup message box in Powerapp Canva

1. Create a New Screen :
   • In your Power App, go to the “Screens” tab.
   • Click on “New Screen” and choose a blank screen template or any other layout that suits your design.
2. Design the Popup :
   • On the new screen, design your popup box. You can use container and add labels, buttons, input controls, or any other elements you need for your popup’s content. 
3. Create a Button or Trigger to Show the Popup :
   • On the screen (or wherever you want to trigger the popup), create a button or control (eg, an icon).
   • In the “OnSelect” property of the button, set it to navigate to the popup screen and make it visible:
     • • Set(PopupVisible, true);
4. Create a Close Button:
   • On the popup screen, create a close button (e.g., an “X” icon or a “Close” button).
   • In the “OnSelect” property of the close button, set it to navigate back to the previous screen and hide the popup:
     
     • • Set(PopupVisible, false);
5. Use a Variable for Visibility:

• • Create a variable to control the visibility of the popup. In the app’s OnStart or OnVisible property, initialize the variable:
    • • Set(PopupVisible, false);

• • Set the “Visible” property of the popup screen to the value of the variable:
    • • PopupVisible

                Test Your Popup:

• • Preview or publish your Power App and test the popup functionality.