I noticed a new button in my Sheets toolbar yesterday:
Just a few days ago, if you wanted to wrap the text within a cell or range, you would have to make your selection, then click on the Format menu to find "Wrap Text." Not horribly inconvenient, but just annoying enough if you use it very often. This new button allows you select between "Overflow" (where the text flows into the adjacent cell if it's empty), "Wrap" (where the text will all show within the cell), or "Clip" (where the overflowing text is hidden). Cool - thanks, Google!