Using the New Command
You can create a new, empty Wide-Jumbo workfile by using the New command or an option on the Text command.
When creating a new file, you can force it to have a Wide-Jumbo format by setting the Language to Data and the Length to a value larger than 1,000 before issuing the New command.
/Set Language Data /Set Length 2500 /New newwork
These commands create a new permanent workfile called Newwork. If you want to create a scratch file with these attributes, enter the New command by itself.