There is also the issue that if you go into any of the "full page" setting screens and return to Joplin the main toolbar labels disappear. For that @laurent suggested that, although he was aware, the impending design change meant that it was not something that he believed needed fixing at this time (my precis). I am in no way suggesting that there is anything wrong with this just suggesting that it is possible that priorities are being adjusted based on impending changes. TBH if @laurent feels that fixing UI issues at this stage, prior to a full UI update, is not a priority I can live with that 
@uxamanda BTW thanks for all your input on css and customisation I have learnt so much!! (and I am sure will forget most of it but some will stick!!)