in the CCC, I don't appear to be able to copy & paste a title from a footnote. This is an important function so I can find the document being referred to if it is not in Logos. It will normal be one the Vatican or EWTN web sites.
Logos 4/5 doesn't currently support selecting/copying text from the footnote displayed at the bottom of the page (in paged view). Click the footnote indicator in the main body of the text to open a popup window that you can copy from.