Microsoft Word versions previous to Word 2010 and Word 2010 and even Windows WordPad had an option to overwrite the text if we press the Insert key before typing anything. Things have changed in Microsoft Word 2007 and onwards. Now there is an Insert Mode which works in the same way as pressing insert key in the previous versions. But the problem is that it must be enabled before it can be used in Microsoft Word 2007 or Word 2010. Otherwise Insert will have no function by default.
To enable this feature in Microsoft Word 2007, follow the instructions below:
Open Microsoft Word 2007 and click on the File Menu Globe on the top left corner of the Microsoft Word window.
Go to Word Options.
In Word Options, go to Advanced and check the following checkbox: "Use the insert key to control overtype mode"
This will enable the Insert Mode in Microsoft Word 2007 and same is the case with Microsoft Word 2010. I’m giving the screenshots of Advanced Options in Microsoft Word 2010.