# Change Block Text High [GstarCAD 2022](Help%20System/GSTARCAD/2022/Index.md) → [User Guide](Help%20System/GSTARCAD/2022/User%20Guide/(User%20Guide).md) → [Express tool](Help%20System/GSTARCAD/2022/User%20Guide/Express%20tool/(Express%20tool).md) → [Blocks](Help%20System/GSTARCAD/2022/User%20Guide/Express%20tool/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: