This menu item is enabled with Tools > Remove Tags.
When enabled, all the formatting tags are removed from source segments.
It is especially useful when dealing with texts where inline formatting is not really useful (e.g., OCRed PDF, bad converted .odt or .docx, etc.)
As only inline tags are removed, normally, it should always be possible to open the target documents.
Non-visible formatting (i.e., which doesn't appear as tags in the OmegaT editor) is kept in the target document.
Didier
Implemented in SVN (/trunk).
Didier
Closing...
This feature was implemented in the released version 2.5.1 of OmegaT.