Alternatively, you can just search the web for whatever image you want, right-click the image, and click Copy Image (note that you cannot click "Copy ... We've talked about changing Mac app icons ...

If there's something you want to keep track of regularly, it belongs on your Mac's menu bar. The left side of the menu bar, of course, shows the menu for the current application. The right side, ...

If you’re on the beta, under Taskbar settings > Taskbar behaviors, you can now select options under Show smaller taskbar ...