# ECW image format support [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [What's new](Help%20System/GSTARCAD/2027/What's%20new/(What's%20new).md) This function supports inserting raster images in ECW compressed image format (. ecw). **Operating Steps:** 1. After executing the ATTACH/IMAGEATTACH command, the Select Reference File dialog box will be displayed, where you can select the ECW file to attach, as shown below.  2. After selecting the ECW file to attach, the Attach Image dialog box will be displayed, where you can set the parameters of raster images, as shown below.  3. In addition, we can attach ECW files through -IMAGE command, as shown below.  --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/GstarCAD2023NEW/ECW%20image%20format%20support.html) · © Gstarsoft Co., Ltd.