Function Syntax: BYLAYERDLG / BYLAYER / BYLAYERCMD / BLDEBUG Version: 1.1 Date: 20.06.2026 6:38:52PM https://forums.autodesk.com/t5/visual-lisp-autolisp-and-general/change-all-to-color-bylayer-linetype-replacement/td-p/1523288 Function: bylayer – Force entity color and/or linetype to Bylayer. Overview: This command allows the user to convert all entities in the drawing so their color and/or linetype properties are set to Bylayer. Routine to change all drawing entities color or linetype, or both to the assigned color and/or linetype. User Prompt: Upon execution, the user selects from three options: • Color – Change only colors to Bylayer. • Linetype – Change only linetypes to Bylayer. • Both – Change both properties to Bylayer. Key Operations: • Unlocks all layers temporarily to allow modification. • Iterates over all blocks and entities (excluding XRefs). • Applies Bylayer color and/or linetype based on user selection. • Handles block attribute definitions – ensures nested attribute colors are also changed. • Restores original layer lock states after processing. Additional Notes: • Attributes inside INSERT entities with attribute definitions (`66=1`) are also modified. • Uses `vlax-property-available-p` to safely access color and linetype properties. • Fully supports nested block-level entity edits. Ideal For: • Cleaning up drawings. • Enforcing CAD standards. • Preparing files for plotting or standardization. Description🎨 All_Color2Layers is an AutoCAD AutoLISP ByLayer cleanup tool for restoring entity color and linetype behavior to layer-controlled standards.🧰 It is useful for CAD standards enforcement, plotting consistency, xref-independent cleanup, and production drawings where object overrides must be removed. Function SyntaxMain dialog command: BYLAYERDLGopens the ByLayer Tool DCL interfaceAlias command: BYLAYERruns the same DCL interfaceCommand-line mode: BYLAYERCMDruns Color/Linetype/Both from the command lineDiagnostic command: BLDEBUGwrites a debug report for DCL/environment troubleshooting SEO Optimized Overview🎨 All_Color2Layers is an SEO-friendly AutoCAD entity cleanup utility for resetting object color and linetype overrides to BYLAYER.🧰 The BYLAYERDLG command writes a temporary DCL dialog with Color only, Linetype only, and Both operation modes.🗂️ The dialog includes scope toggles for Model Space, Paper Spaces, and Block Definitions, plus a layout filter and multi-select list.↩️ Apply creates an undo mark and the custom Undo button reopens the dialog after running AutoCAD UNDO 1.🔍 The code unlocks locked layers temporarily, processes non-xref blocks/entities, restores layer locks, and stores dialog settings with getcfg/setcfg. Primary Workflow1️⃣ Run BYLAYERDLG or BYLAYER to open the ByLayer Tool dialog.2️⃣ Choose Color only, Linetype only, or Both.3️⃣ Set the scope toggles for Model Space, Paper Spaces, and Block Definitions.4️⃣ Filter and select the relevant list entries, then click Apply.5️⃣ Use Undo in the dialog when the last cleanup step must be rolled back. Functionalities✅ Reset entity Color to BYLAYER.✅ Reset entity Linetype to BYLAYER.✅ Reset both Color and Linetype in one operation.✅ Choose processing scope: Model Space, Paper Spaces, and Block Definitions.✅ Filter layouts/layers with wildcard-style filtering.✅ Select all or select none in the DCL list.✅ Temporarily unlock locked layers and restore their lock state after processing.✅ Save operation mode, scope, filter, and dialog position between sessions.✅ Provide an undo button for the last ByLayer operation step. Important Commands and Functions🧩 BYLAYERDLG - main DCL command for the ByLayer cleanup interface.🧩 BYLAYER - alias that opens the same interface.🧩 BYLAYERCMD - command-line mode for Color, Linetype, or Both.🧩 BL:Process - core object traversal and property reset function.🧩 acbylayer - ActiveX color constant used to reset entity color.🧩 vla-put-lock - temporarily unlocks and restores locked layers during cleanup. Result🎯 The result is a cleaner AutoCAD drawing where object-level color and linetype overrides are returned to layer-driven CAD standards.🧱 This improves layer management, plotting consistency, CAD auditing, and Civil 3D production file cleanup. Important Notes⚠️ The routine can process many entities across model space, layouts, and block definitions; test scope settings before running on large project drawings.⚠️ It intentionally changes entity properties, so use undo or a backup when cleaning production files.⚠️ The code skips xref block definitions and avoids xref-style block names when traversing blocks. Tags🏷️ AutoCAD, 🏷️ AutoLISP, 🏷️ Civil 3D, 🏷️ BYLAYER, 🏷️ Color Cleanup, 🏷️ Linetype Cleanup, 🏷️ Layer Standards, 🏷️ DCL Dialog, 🏷️ CAD Cleanup, 🏷️ All_Color2Layers