Just a simple text box with or without background.
Other than normal you can't enter a text size but you can enter a maximum text size (even for parts or words).
Any text will fit in the box, Resizing the text box automatically resizes the text while keeping the relative text sizes.
You can adjust background color and opacity either by on/off or numerical as well as the border (padding). A "quasi transparent" background option can be used to additionally add the "Text Box Border" effect for even more control over background and border. This latter effect also allows to change background values across multiple instances of the title.