⚠️ Be cautious: Only download CTB files from reputable CAD communities to avoid corrupted or malicious files.

AutoCAD installs a default monochrome.ctb file.
Location (typical):
C:\Users\[YourUsername]\AppData\Roaming\Autodesk\AutoCAD [Version]\Rxx.x\enu\Plotters\Plot Styles\

Drag and drop the downloaded .ctb file into the Plot Styles folder.

Download a monochrome CTB file if:

Avoid unreliable sites that bundle CTB files with adware or require suspicious “download managers.”

If you need a baseline mapping:

A CTB (Color-Dependent Plot Style Table) file controls how colors in your AutoCAD drawing translate to printed output. A Monochrome CTB file forces everything to print in black and white (or grayscale), regardless of the original layer or object color in your drawing.