AutoCAD - Filters

AutoCAD filters are helpful but it seems arent used as much as they should be. Filters can be based off of Layer Propeties or Group. The Properties Filter is based off of the Layer criteria like: on/off, Name, Color, etc. This makes it easy to filter all of the red layers or layers that start with "A". For the Group filter, this is when the consistancy of layer criteria is mixed. We want to Group layers like A-Door with a color of green, and S-Grid with a color of red. There isnt a similarity between them, but we can pull them together in a Group.