# Change Block Text High [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [User Guide](Help%20System/GSTARCAD/2026/User%20Guide/(User%20Guide).md) → [Express Tools](Help%20System/GSTARCAD/2026/User%20Guide/Express%20Tools/(Express%20Tools).md) → [Blocks](Help%20System/GSTARCAD/2026/User%20Guide/Express%20Tools/Blocks/(Blocks).md) The bChgHei function can change the height of the block, it only takes effect on text or mtext, attribute text can't be changed. ## Operation steps: 1. Start the command. 2. Input a new text height value. 3. Select objects whose text heights need to be changed. 4. Enter to finish,the result will be as below: --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/GUG_ET_Blocks/Change%20Block%20Text%20High.html) · © Gstarsoft Co., Ltd.