How to refresh a view of a folder in KDE Dolphin?

In Windows' explorer, the address bar has a refresh button: ![Windows explorer address bar screenshot, with refresh button highlighted ][2] This button refreshes the view of the open folder (directory). This is useful, for example, when some file operation has been finished elsewhere, but this particular window of explorer hasn't updated its view yet. How do I do the same in Dolphin, the default file browser in KDE?