Is it possible to open multiple drawings at the same time in AutoCAD?

ByCADbrief Staff

Short Answer

Yes, it is possible to open multiple drawings at the same time in AutoCAD by using the OPEN command and loading each DWG in its own drawing tab within the same session. This is the most common professional method for switching between active files quickly. Large files can slow performance.

What You Need to Know Before

Warning: Opening many DWG files at once can consume a lot of RAM and graphics resources, especially with xref-heavy or 3D drawings. A common failure is thinking a file did not open when it is actually loaded in a hidden or inactive drawing tab.

How to Open Multiple Drawings at the Same Time in AutoCAD

  • Command: OPEN

  • Shortcut: Ctrl+O

  • Quick Steps:

    1. In the Ribbon, go to Application Menu > Open > Drawing, or press Ctrl+O.
    2. In the Select File dialog, hold Ctrl or Shift and select multiple DWG files.
    3. Click Open to load them into separate drawing tabs in the current AutoCAD session.

Variables & Settings

  • System Variable: FILETAB (Default: 1)

  • Expert Setting: When FILETAB is set to 1, AutoCAD shows drawing tabs so you can see and switch between all open drawings easily. If set to 0, the drawings may still be open, but tab-based navigation is hidden and users often assume only one file opened.

Why it Fails

  • Cause 1 (Geometry): Very large 3D models or drawings with heavy XREF attachments can make additional files open extremely slowly or appear unresponsive.

  • Cause 2 (layers/Locks): If a drawing references locked network files, missing XREF paths, or restricted folders, some drawings may fail to fully load.

  • Cause 3 (Command/Logic): If FILETAB is turned off, users may open multiple files successfully but not realize they are loaded because no drawing tabs are visible.

Quick Fix & Best Practice

  • Quick Fix: Set FILETAB to 1, then use OPEN and multi-select the DWG files from the Open dialog.

  • Manager’s Verdict: Use multiple open drawings for review, copy-paste work, and coordination between files. Avoid opening too many large production drawings at once on lower-spec machines, especially when XREFs and sheet sets are involved.

FAQ

Can AutoCAD show all open drawings in tabs?

Yes, if FILETAB is set to 1.

Can I open multiple DWG files from Windows Explorer?

Yes, but opening them from AutoCAD with OPEN gives better control.

Is there a limit to how many drawings AutoCAD can open?

There is no practical fixed command limit, but system memory and file size usually become the real limit.

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