This is one of the new commands in AutoCAD 2008 that is sort of overlooked, but can save you a lot of time. If you use xrefs, then how many times have you had a problem with the parent drawing crashing? You might try running AUDIT or RECOVER on the parent drawing and find there are no errors, but you continue to have problems with this drawing. Read more about RecoverAll
Starting in AutoCAD 2008, you can now control more layer properties on a per viewport basis. You could always freeze layers per viewport, but now you can change color, linetype, lineweight, and plot style. Now the same line can be red with the hidden linetype in one viewport and green with a continuous linetype in another viewport.
Here is an example of creating a TABLE entity using lisp. This example also creates some FIELDS using lisp.
This routine allows the user to select closed polylines, and it will create a TABLE with two columns. One containing the area, and the other containing the ObjectID. The last row totals up the area. You could easily adapt this to show the layer, color or any other property. Read more about Create a TABLE using lisp
Do you have an application such as AutoCAD that is displaying any of the following symptoms?
Starting up slower than normal?
Running slower than normal?
Long delays when you try to run a particular function, like save, open, or plot?
If you have already ruled out typical suspects such as a virus, spyware, malware, hardware limitations, etc., then there is a good chance that maybe the application is simply looking for something that isn't there. Windows and windows applications like to search for things for what seems like an eternity. So how can you find out what is going on behind the scenes? Read more about Tracking down why that application is slow