Try ToolsOptionsEditTyping Replaces Selection.

--
Greg Maxey/Word MVP
See:
http://gregmaxey.mvps.org/word_tips.htm
For some helpful tips using Word.

Tristazee wrote:
In Word 2003: I used to be able to select text and then start typing
and Word would replace the selected text with what I was typing. Now
when I select text and begin typing, Word inserts the new letters
next to the selected text. I don't know why it changed. I would
like to know how to change it back. [Pressing the 'insert' button
doesn't make a difference] Thanks