Apple Final Cut Pro 6 - Manual (Page 1409)

624 Part IV Real Time and Rendering
Because the settings in the RT pop-up menu and the Playback Control tab are almost
identical, it is often more convenient to access the RT pop-up menu directly from
the Timeline.
To change a real-time playback setting in the RT pop-up menu:
1 Make sure a sequence is open in the Timeline, then choose an option from the
RT pop-up menu.
Render Control Tab in Sequence Settings
Several options that affect both rendering and real-time playback can be selected in
the Render Control tab of the Sequence Settings window. These settings are adjusted
per sequence.
You can deselect any of the following options to improve real-time performance:
 Filters
 Frame Blending For Speed
However, remember to select these options if you want to render these effects.
To open the Render Control tab:
1 Select a sequence or click in the Timeline window to make it active.
2 Choose Sequence > Settings, then click the Render Control tab.
Settings in the
RT pop-up menu