AutoCAD Color-Based Plot Style File
3.8 | 20 Votes
What is a CTB file?
File used by AutoCAD, a CAD program used for 2D and 3D drawing; contains color-based plot styles, or mappings of colors to layers of objects; used to attach color and display settings to design objects.
CTB files can be replaced by the newer .STB format, which abstracts layer color-based properties to object-based properties. Many companies still use CTB files instead of STB files because of the cost required to train personnel and to upgrade existing CAD designs.
NOTE: CTB files and STB files cannot both be used within the same CAD design. CTB files may be converted to STB files using AutoCAD.
Programs that open or reference CTB files
Cherrytree SQLite Document
3.0 | 7 Votes
A CTB file may also be a document created by Cherrytree, a note-taking application. It stores document data in SQLite format, which may include text, tables, images, objects, and document settings. CTB files protected with a password are saved as .CTX files.
Users typically save Cherrytree documents as CTB or CTX files. However, they may also save documents in XML format as .CTD files. Password-protected CTD files are saved as .CTZ files. CTD and CTZ files are useful for saving documents that are smaller in size than CTB and CTX files.
NOTE: Cherrytree is developed by giuspen, a portmanteau of Giuseppe Penone.