When you want to preview effects in a sequence, you can use the Render On-the-Fly feature to control how your Avid editing application displays a monitored frame to which one or more effects have been applied. When Render On-the-Fly is selected, you can step through your sequence and preview any frame to check the look of the effects applied to it, regardless of the type or number of those effects.

When Render On-the-Fly is selected, whenever you change the frame you are monitoring, the Avid editing application updates to show the image that results from any effects applied to that frame. Depending on the number and complexity of effects, there might be a perceptible delay before the image updates in the Composer monitor.

When Render On-the-Fly is deselected, the application shows the monitored frame as if no effects had been applied to it. You can deselect Render On-the-Fly to avoid delays in image updating when you are not concerned about the look of effects.

Render On-the-Fly controls how your Avid editing application displays a frame only when the position indicator is stationary at that frame. During playback (that is, while the position indicator is in motion), the application's ability to display effects depends on whether real-time effects are enabled and on other associated factors. For more information, see Real-Time Preview of Video Effects.