This article explains the Text, HTML, and Embedding block that can be added to design an app.
https://youtu.be/oFIwNnoqpvQ
https://youtu.be/PdPggmODro0
Click on the block and start editing on the panel that appears on the right side.
This is what appears as the label for the content added in this block.
This is the area in which you need to write plain text or HTML for the end-users to consume.
Plain text
You can simply type any text in the box and it will appear as a read-only text to the end-users.
HTML
If you know the basics of HTML, you can add rich text or anything that HTML supports by writing HTML in the input box.
If you don't know how to write HTML, we recommend using this awesome service https://wordtohtml.net/ that lets you write anything like a word file and converts it into HTML. Copy the converted HTML and paste it here.
Popular ones -
Others -