# ETT [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Innovative Features](Help%20System/GSTARCAD/2027/Innovative%20Features/(Innovative%20Features).md) Normally after extension, the extension effect will be displayed, but ETT command can display the effect in real time until you confirm the position. ## Operation steps: 1. Start the command. 2. Select the line that needs to be extended, the system will choose the nearest side you clicked as extension side automatically . 3. Move the cursor and the segment will extend in real time. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/FEATURE/GSTARCADTOOLS_ETT.html) · © Gstarsoft Co., Ltd.