Cadcorp SIS Overlay File (*.ovl)

Supports Overlay files (*.ovl) which contain the definition of a single Overlay.

Exporting an overlay to a .ovl file will preserve all settings for that overlay. The exported file can then be shared with other Cadcorp users.

To export an overlay to a .ovl file open the Overlays dialog, select the overlay to export and select Export to File from the Overlay drop-down:

Note: Cadcorp SIS Overlay files (*.ovl) cannot be created from scratch they are only opened from an exported file.


  • Cadcorp SIS Desktop
  • Cadcorp SIS Desktop Express
  • Cadcorp SIS ActiveX Modeller
  • Cadcorp SIS ActiveX Manager
  • Cadcorp SIS ActiveX Viewer
  • Cadcorp GeognoSIS