I have tried using Apple Grab as BMP and GIFF.
I have changed the screen capture file format in terminal using "defaults write com.apple.screencapture type bmp/giff/png/tiff"
I have tried copying the screen capture to clipboard and using paste or paste special (there is no option for file format bmp in paste special like there is on windows).
I have tried saving the image as all of the above file formats and inserting it.
I have tried saving the image, changing the dpi to 96 and inserting it.
I have tried resizing the image so that when inserted it is the same size as the saved version.
I have not tried a JPEG format as it is a text/chart capture and as JPEG uses lossy compression it will lose detail and look blurred. As the image is lacking in colour but has fine lines then a lossless GIFF or PNG format will be ideal but I cannot even get
it to work with an uncompressed BMP or TIFF.
It looks fine as a saved file. It looks fine in Pages. It looks terrible in Word.
I can only think that Word for some reason is pasting/inserting it in as a JPEG. How to change that I have no idea.
Otherwise maybe there is a dpi conflict with Word.