[Framers] Mif wash .book files

[Peter Gold]

To open a MIF file in FM​ as plain text, press and hold Shift (or Ctrl)
when choosing Open, then choose Text in the dialog box that appears.
(Working from long-unused human memory experience.)

See:

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http://help.adobe.com/en_US/FrameMaker/8.0/help.html?content=Chap2-FrameMaker-Basics_099.html

Save the file as Text when done editing to keep it in MIF format. In FM,
open normally to convert the MIF text into FM format. Save as FM.

HTH.