tkCNC Editor is a text editor, specially designed for editing of CNC code (G-code) for CNC machines. It is used by CNC programmers and operators for fast editing and verification of CNC code. tkCNC Editor version 2.0 has implemented these functions: MDI (Multiple document interface) allows editing of multiple NC documents, G-code syntax highlighting, Multiple Undo/Redo, Print Preview NC documents preview before printing, All standard text editor functions such as Cut, Copy, Paste..., Fast NC blocks renumeration, Find/Replace function with special features for NC code searching, Fast points import from AutoCAD, Generator of circular and rectangular point patterns (coordinates), Smart NC code templates, Various operations with NC code registers such as: mirroring, renumerating, translation, rotation, basic mathematical operations (+,-,*,/), sorting etc., Conversion of 2D coordinates from polar to Cartesian system and vice versa, NC code registers swapping, NC code registers sorting (order in block), 3D tool path simulation with possibility of export in AutoCAD or DXF file (Simulation supports NC code analysis block by block, coordinates viewing for every toolpath point, tools diameter representation), Degrees conversion from Degrees/Minutes/Seconds format to decimal format and vice versa, Automated NC documents joining, "QuickCalc" function implemented in text editor window for quick calculation of simple mathematical expressions directly in code