Simplify the following text for a Grade 6 native English-speaking person.
Original: Cast metal sorts were composited into words and lines of text and tightly bound together to make up a page image called a forme , with all letter faces exactly the same height to form an even surface of type .
Simplified: Cast metal sorts were grouped into words and lines of text and tightly bound together to make up a page image called a forme . All letter faces were set to the same height , to form an even surface of type .