This is probably discussed in the "Help" or the User's Guide associated
with Word Perfect. If you need to ask the question on-line, suggest you
find a forum specific to Word Perfect (which is an application owned by
Corel which runs on XP and other operating systems).
WordPerfect is not a part of Windows, and questions about it are
really not appropriate here. But to answer your question, you can
change the zoom amount either by going to View | Zoom, or by
holding down the Ctrl key and scrolling the mouse wheel.
Next time, please try asking WordPerfect questions on the server
cnews.corel.com, in the newsgroup pertaining to your version of
WordPerfect. SUch questions will be on topic there, and you'll
also find people more qualified to help with such questions.