Powerpoint keeps highlighting words, that I know are in my custom
dictionary, as being mispelt. I have tried click "add to dictionary"
but without success. I have located my custom dictionary file, and I
can see that the "misspelt words" are definitely in the file;
furthmore I am not having any problems with Microsoft Word. I suspect
that somehow Powerpoint has stopped using this file. Can anybody
suggest a way that I can fix this please?

Harry