AutoCAD® - The LAYERDLGMODE System Variable
I'm not one that likes to scroll horizontally - so my layer dialog box fills the whole screen so that I can see all the layer names and all the properties of the layer. Not surprising then that I'm not fond of the new(ish) palette version of the layer dialog box, as docking it anywhere isn't totally practical. Also, having it docked to the screen means it needs to be kept up to date so you are working from up to date information. Therefore, docking it to the screen adds more overhead to AutoCAD® - something I try to minimise as much as I can.
So, if like me you want to revert back to the old layer dialog, you need to set LAYERDLGMODE to 0. Setting it to 1 will use the palette version.