Apple Final Cut Pro 6 - Manual (Page 1440)

Chapter 29 Rendering and Video Processing Settings 655
IV
4 Choose Sequence > Render All > Both.
5 If your project has not yet been saved, Final Cut Pro prompts you to save your project
so a Render folder can be created.
A status window appears showing the rendering progress. Click Cancel to stop rendering.
Note: All frames that have already been rendered remain written to disk, even if
rendering is canceled.
Render Only
The items in the Render Only submenu allow you to focus on rendering segments in a
particular render status category, such as Preview or Proxy quality. Each item in this
submenu operates either on a selected region of the Timeline or on the entire
sequence, if no selection is made.
For example, to render all segments in a sequence that have Preview render status,
make sure nothing is selected in the Timeline (choose Edit > Deselect All) and then
choose Sequence > Render Only > Preview.