Still-Image Real-Time Playback
Still images and imported graphics can also play back in real time. The number of still
images that play back in real time depends on the size of the still cache set in the
Memory & Cache tab of the System Settings window.
The size of the still cache is limited by the total amount of unused physical RAM
installed in your computer. The larger the still cache, the more still images can be
played back in real time in the currently selected sequence. If another sequence is
opened, the contents of the still cache are automatically replaced with still images from
the new sequence.