1 In Data Tools, click Data Validation, and then click Data Validation. 2  In the Input message tab, check Show input message when cell is selected. 3  In Title, enter a title for the pop-up window. 4  In Input Message, enter the text you want to appear in the pop-up window.
Melamine resin contains melamine in a manner similar to table salt containing chlorine. While melamine is dangerous to ingest, melamine resin is not. Melamine is the chemical that has been contaminating pet-food lately. Melamine resin is the thermoplastic from which plastic-ware, counter-tops, etc are made.
Melamine is just the outer coating (and I do like its cleanability). You still might want plywood shelves because the alternative is the composite stuff like MDF which can warp over time--any LONG shelves at least should be plywood. But it's not melamine vs plywood. It's melamine on top of something vs plywood and you need to compare what's under the melamine.