The characters in my contents
A number representing the current position of the knob.
The color of the background behind the text
The color of the text
All my characters except the first one
The character at the my cursor position
How many elements are within me
The position among my characters that replacement text would go
The first character in my contents
insert the given string at my cursor position
insert the characters from another object at my cursor position
The last character in my contents