: Type STYLESMANAGER in the AutoCAD command line and press Enter. This opens the specific "Plot Styles" folder where AutoCAD looks for .ctb files.
AutoCAD's CTB (Color-Based Plot Style Table) files control the plotting and printing of AutoCAD drawings. A monochrome CTB file is used to print drawings in black and white. In this guide, we will walk you through the process of downloading and using a monochrome CTB file in AutoCAD. Autocad Monochrome Ctb File Download