How Do I Install a CTB File in AutoCAD?

How Do I Install a CTB File in AutoCAD?

When working with AutoCAD, you may come across the need to install a CTB file. A CTB file, also known as a Color-Based Plot Style Table, is used to define the color and line weight of objects when plotting or printing in AutoCAD.

Installing a CTB file can help you achieve consistent and desired plot results. In this tutorial, we will guide you through the process of installing a CTB file in AutoCAD.

Step 1: Downloading the CTB File

The first step is to download the CTB file that you want to install. There are various websites and online communities where you can find free and paid CTB files for different purposes. Make sure to choose a reliable source for downloading the file.

Step 2: Locating the Plot Styles Folder

Once you have downloaded the CTB file, locate the Plot Styles folder on your computer. The location of this folder may vary depending on your AutoCAD version and operating system.

  • In AutoCAD 2019 and newer versions, the default location is: C:\Users\[Username]\AppData\Roaming\Autodesk\AutoCAD [Version]\[Language]\Support\Plot Styles
  • In earlier versions of AutoCAD, you can find the Plot Styles folder in the installation directory.

Step 3: Copying the CTB File

Now that you have located the Plot Styles folder, copy the downloaded CTB file into this folder. You can simply drag and drop it into the folder or use copy-paste.

Step 4: Accessing the Plot Style Manager

To use the newly installed CTB file in AutoCAD, you need to access the Plot Style Manager. There are different ways to open it, but one common method is to type ‘PlotStyleManager’ in the command line or search for it in the application menu.

Step 5: Loading the CTB File

Once the Plot Style Manager is open, click on the ‘Add-A-Plot Style Table Wizard’ button. This will launch a wizard that will guide you through the process of adding a new plot style table.

  • Select ‘Use An Existing Plot Style Table’ and click ‘Next’.
  • Choose ‘Color-Based’ as the plot style table type and click ‘Next’.
  • Browse to the Plot Styles folder where you copied the CTB file and select it.
  • Click ‘Finish’ to complete the process of loading the CTB file.


If you want to set this CTB file as your default plot style table, select it from the list in Plot Style Manager and click on ‘Set Current’. This will make it your default choice for future plotting or printing tasks.

Step 6: Applying the CTB File

Now that you have loaded the CTB file, you can apply it to your drawings. To do this:

  • Open your drawing in AutoCAD.
  • Navigate to the ‘Layout’ tab or any other desired layout where you want to apply the plot style.
  • In Model Space or Paper Space, right-click inside a viewport and choose ‘Properties’ from the context menu.
  • In the ‘Properties’ palette, expand the ‘Custom’ section and locate the ‘Plot Style Table (Pen Assignments)’ property.
  • Click on the drop-down menu and select the newly installed CTB file from the list.

That’s it! You have successfully installed and applied a CTB file in AutoCAD. Now, when you plot or print your drawing, AutoCAD will use the defined colors and line weights specified in the CTB file, providing you with consistent and accurate results.

Remember, you can repeat this process to install multiple CTB files in AutoCAD and switch between them as needed for different projects or requirements. Experiment with different CTB files to find the one that best suits your needs and enhances your plotting experience in AutoCAD.