In the same way as on a router, press ? to prompt for valid keywords, or press space to auto-complete while typing. This function helps both with finding your way around Junos, and to speed up the editing process.

The content assistant also offers links to the online help from the router.

There's no need to worry about keeping the structure of the configuration file tidy while editing. The content assistant has both a look-ahead function and an understanding of the layout of the file. When accepting a keyword, the configuration file is automatically shaped around any new section. Move the mouse over the image below to show the effect of pressing enter here.