Help. Im confuse when writing in the screenplay format

When I writing in the screenplay format, the letters are lowercase. When I write in the scene tab of the screenplay templates. All the letter becomes capitalized but I did not press caps lock. The letters suddenly became capitalized on the scene tab but the letters did not capitalized on the screenplay format. I’m just confused right now, it is my first time writing on this software. I just need help from other fellow expert screenwriters who worked on this software before. Can someone help me on this?

Should you type in capitalized letter in both the screenplay format and scene heading? It all happens in the screenplay templates.