: How the text appears on screen (e.g., as floating bubbles or a close-up of the screen) is usually decided by the director, so you don't need to over-describe the visual effects in your script.
: For a single message, you can describe the action and include the text in quotes within the narrative. Send your Scripts
For more specific guidance, you can explore detailed advice from Screenplay Formatting Tips or No Film School . : How the text appears on screen (e
Example: INSERT - PHONE SCREEN followed by the text, then BACK TO SCENE to return to the main action. Send your Scripts