If you open older files, for example from version 2010, with Office 2007 applications, they are automatically started in compatibility mode. In this mode, many new 2010 functions are missing in Word, Excel or even PowerPoint, which are not compatible with the older files. Documents of the new Office version can be recognized by the suffix docx, xlsx etc. The "x" documents remember the version with which they were created. With a little trick, however, all new Office 2010 features can continue to be applied to older Office files in the future, thereby avoiding the compatibility mode.
Office 2010: More functions without compatibility mode
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If this tip doesn't work for you - delete the Normal.dot (m)
-File. E.Simply search for "Normal" on the C: drive. If there are several, delete them all.
After that, the 2010 features go again.