The X-Sequencer is designed to perform advanced editing operations on the sequence.

The following descriptions will clarify it:

- sequence - a set of images (frames) stored on disk

- x-sequence - a set of references to the sequence images

- x-frame - a held frame in the x-sequence, shown with an asterisk.

- frame - it is captured frame and possible amount of x-frames, which determines duration of the frame

- X-Sequencer (a.k.a. exposure sheet) - sequence editor, which includes x-sequence.

For example - you have captured 1 frame. On disk it is one physical file. In the X-Sequencer you can multiply this frame to any amount, but on the disk is still the one frame.

Another example - you have captured 10 frames. If the 'Hold' value is equal to 1, x-sequence will contain 10 frames (with 1 frame duration). If the 'Hold' value is 2 - in the x-sequence will be 20 frames (10 frames with 2 frames duration, each frame has one x-frame). 'Hold' set to 10 makes 100 frames in the x-sequence, but still only 10 on disk (each frame has 9 x-frames).

Even if you copy all the 100 frames and paste at the end of x-sequence, you get 200 frames, but still only 10 frames are stored on disk.

AnimatorHD will help you make use of the x-sequence:

- AVI export is based on the x-sequence.
- export to Adobe Premiere and After Effects is also based on the x-sequence . Moreover it is based on the stored files - no additional disk space for exported frames is required.
- all the other functions including playback and managing are based on the x-sequence.