Alas, Snap! doesn’t make it straightforward for users to make up title text on the fly.
We, the Snap! Team, aren’t offended if you decide to write your program in (say) Python. We only get offended if you try to write it in Snap!, but have it behave as if you’d written it in Python. Each language has its own affordances, as they say in the prog lang industry. :~)
Edit: I accidentally put a useless append () () block and left some scrapped blocks in the definition. This is even more elegant, forget about the old one.