Detect Zero-Length Entities

Toolbar / Icon:
Add-on:  QCAD Professional
Menu: Modify > Detection > Detect Zero-Length Entities
Shortcut: M, Z
Commands: zerolength | zero


This tool can be used to find, select and optionally delete very small entities (length almost 0) in the current drawing.


  1. After launching the tool, the options tool bar displays controls to enter tolerance values that are used to detect zero length entities. Adjust these if appropriate.
  2. Click the refresh button to run the search again if you have made any adjustments to the tolerances and the "Auto" check box is not checked:

    If the "Auto" check box is checked, the search for duplicates is automatically repeated if you change any of the options.
  3. Click the delete button if you wish to delete the selected zero length entities:
  4. Click the close button to terminate this tool: