Thanks Mark,
It worked... but not initially. it seems fussy about what goes in the file, whether it can go in separate files and at least what comes before. It probably didn't help that the example in "how to hide" had a typo in that there was a ')' instead of a '}' like this "h2.tc-title {display:none;)"
In the end I did this
tc-subtitle {display:none;} h2.tc-title {display:none;} .tc-tags-wrapper {display: none;} with some explanatory text after
and it worked, but a few permutations sometimes showed dates and titles etc. One thing I did work out is that if you put (explanatory) text at the start of the toddler then it doesn’t like it but after was ok. Sorry if my formatting is a bit hard to understand, I'm still working out how to quote code.
Eventually I would like a clean evernote experience where you can easily choose which fields to display and not and if you just write in the text field then the first line becomes the title.
I also find it a bit annoying to not be able to simply type or tab down from the title to where I want my text. (Basically I'm talking about fast entry of one or two lines of text per toddler,) That's another topic so I'll have a go at another time. I'm very thankful that I have made this progress today.
I will also have a look at TonyM's solution below but the first read looks complicated and I don't know what a "pill" is. It's a good learning experience!