With minimalistic text, select your widget size, then press Layout on the top bar of the page. On the next screen, press the plus in the bottom left corner, then using the scrolling bar along the top, go to misc, then put a tick in the static text checkbox. Then press Ok and you should be taken to your widget layout screen where you can enter your static text.
Does that all make sense? I'm am rubbish at typing out instructions like that so if you need pics or something, let me know.