Use t option in Read application

How do i use the t (terminator) option in the Read application?

Which version of Asterisk? (You will need at least version 18.)

Normally parameter values are in parentheses and immediately follow the parameter.

asterisk version 18.2.2

The ‘t’ option doesn’t exist in Asterisk 18.2.2. You should use the latest version.

What is the format to use it in the latest version?