Cutting between lettering on a cake that is attached. (Written in script). Eating cupcakes with writing on top of them.
Heating Up Metal, e.g., Incandescent Bulb, Fluorescent Bulb, etc.
Is There a Problem with Spreading Foods (e.g., Peanut Butter, Cheese, Hummus, etc.) onto Challah, Matzah, etc. on Shabbos?;