The layer control commands that are available in Autodesk Land Desktop as two and three-letter macros, which you enter on the command line. They are not listed on a menu. The macros that relate to layer control in Autodesk Land Desktop are:
LAI Layer Isolate
LAF Layer Off
LAK Layer Lock
LAO Layer On
LAP Change Layer Color/Linetype
LAS Layer Set
LAT Layer Thaw
LAU Layer Unlock
LAZ Layer Freeze
LOA Layer On All
YE Layer Erase
YS Layer Scale
A coworker of mine, and former user of Land has asked if there's an ability to access these. He's very familiar with them and we looked at a couple on LDC09 and they do seem helpful. Especially the layer Set with the way the new layer dialog box is in 09.