Marquee is by nature a Tracking console. With Tracking, when a cue brings a channel to a level, the channel stays at that level until it receives a specific instruction to change levels. This level tracks through all subsequent cues in the cue list until the level is increased or decreased in another cue.
Levels which have tracked in a cue are displayed on the channel grid
in magenta with a circular arrow symbol beside the level:
If you record a hard level in Cue 2 that is exactly the same level that
is in Cue 1, you will get a magenta level with a white block showing there
is a redundant command: 
A good way to understand tracking is to think of how you use lights every day:
When you enter a room, you turn on a room light.
Then you may turn on your desk light. You do not need to turn on the room light again.
The room light and the desk light will remain on until you purposefully turn one or both off.
With Marquee, you record channel 1 at 80%. If nothing else sends a command to that channel it will stay at 80%, no matter what other channels might be added or changed. Channel 1 will continue at 80% through all subsequent cues until it is told to change its level by a later cue.
One of the advantages of tracking desks is that you can have multiple cues fading simultaneously because each cue only 'talks' to the channels it has information about. That means that if a long fade is happening on, say, Channel 1, but Cue 2 runs and moves Channel 2 to different level in short time, that will not affect Channel 1's fade.
Example:
Cue 1 is a 45 second fade up on the cyc to show a slow sunrise
Cue 2 is a 2 second fade up on an actor's front light
Cue 3 is a 5 second fade down on the actor's front light
When running the show, you're never sure when the actor is going to decide to enter, so inherently, Cue 2 must be a called cue. Chances are that the actor will enter at some point during the sunrise. Pressing [GO] on Cue 2 should not affect the subtlety of the 45 second fade on Cue 1. To really drive the point home, the actor may exit before the sunrise has even completed. There is nothing in Cue 3 that address the cyc fixtures so pressing [GO] on Cue 3 still does not affect the progression of the sunrise.
It is important to remember that Preset style desks cannot offer you this flexibility. In Preset desks, each and every channel is recorded at its stage level in every cue. That would mean that in Cue 2, the cyc would be at its full sunrise level. So, when you press [GO] on Cue 2 midway through the subtle sunrise because the actor stepped on stage, your sunrise will complete in a not-so-subtle 2 seconds flat!
If you really want to, you can operate Marquee as a Preset desk. Just set the Record combo box to All Levels [Block Cue] in the record dialog box. That way, every channel will have a recorded level in every cue. This is highly undesirable because you loose the functionality as described above, but worse yet, you completely deflate the power of having multiple cue lists. If you have every channel recorded in every cue, each time you press [GO] on any cue list, the entire rig will go to the recorded levels of that cue - stealing everything away from the other cue list. (If this appeals to you, you may want to check out how to Block the Entire Cue List)
Note:
If you are updating a cue and don't want the edits to track forward, turn OFF Edits Track Forward in the Record dialog box. The cue after the cue you are updating will be automagically updated to reverse the effects of what you just recorded.
You cannot select Edits Track Forward OFF if you are updating or recording the last cue in a cue list.
You can change the system default state of Edit Track Forward for the Record dialog box in [S2]Show Options|General
See Also: