What is this feature?

A line focusing tool or screen masking, enables the user to narrow their visual focus of the text they are reading by horizontally highlighting a line within that text.

How do I use it?

The user starts the line focus tool, then uses the mouse to move from line to line of text as they read.

This is similar to using an index card to focus on a line of text in a book.

How does it help?

A line focusing tool or screen masking can help keep the user’s attention on the specific line of text that is being read.