Where is the spell check for hotmail? keeps disappearing

I am not able to use spell check in outgoing hotmail messages.  The option was available last week and has disappeared again   for example the mispelled words were underlined in red and then a drop down presented with options.....  Now, no underlying and when I attempt by clicking the drop down has undo and no spelling suggestionsHHHHHHHHHEEEEEEEEEEEELLLLLLLLLLLLPPPPPPP