Using the Command Launcher

One of the most useful functions of ImageJ is the Command Launcher (also known as Command Finder). The keyboard shortcut is Ctrl +L (or Command +L on Macs).

Once the window opens, just type part of the menu item you want to launch, and it will show you a list of commands that match that substring:

If you are not quite sure about the spelling, just click on the Fuzzy matching checkbox:

If you want to know what menu the entries are in, or from which .jar files they come, enable the full information: