My sites are a mixture of blogging and pages: no problems with the former, and not many with the latter.
I can open up a different page within my pages, and have this appear in a new window/tab (depending on browser) using basic HTML such as <!text to appear>.
What I would like to be able to do as an act of courtesy for my few readers, is to provide them with the ability to close the window by clicking on some text. The standard HTML I have seen is:
but this doesn't appear to work.
I am using Pilcrow as my theme. I have attempted to turn the code into comments: apologies if this hasn't worked!