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In iOS 18, iPadOS 18, and macOS 15 Sequoia, Apple removed a standard feature of the Calculator app that allowed users to press the = button multiple times to repeat the last mathematical operation. Following user complaints, the company reinstated this feature in iOS 18.3, iPadOS 18.3, and macOS 15.3. Now, to calculate the compound interest from investing $1,000 at 5%, you can multiply 1000 by 1.05 and press = repeatedly to see how your investment would grow.

You can now work directly with PDFs received in the Mail app using a little-known feature in iOS 18 and iPadOS 18. Tap a PDF attachment in a message and use the Markup and Form Fill buttons at the bottom to access the PDF markup and filling tools. After modifying your PDF, tapping the Done button gives you options for what to do with the PDF: include it in a reply, create a new message with it, save it to Files, or discard the changes.

We’re taking a brief break from helping you become more productive to recommend a feature that could spark moments of joy for Apple Watch users. In watchOS 11, the new Photos watch face can display a photo from a shuffled set of images each time you raise your wrist (or tap the screen). Like the Lock Screen customization feature on the iPhone and iPad, the Photos face can dynamically select images of your favorite people, nature, and cities from your photo library. (You can also choose photos manually.) The time appears in an appropriate spot and size.