Hold Option key to transform from centre
Another basic function, common to almost all design software on the market: holding the Option key while dragging the handle of an object or text box makes it transform from its centre point. A very simple and useful tool for doing fast and precise layout work.
Today, I learned that there is such a function, but in typical PowerPoint fashion, you hold down the CTRL key, rather than the usual Option key. Instead, the Option key gives you precise, um, control over your transformations (no snapping). So for some reason, the designers have decided to invert these two functionalities. Also they don't work at all with vector lines.