# TSTACKSIZE System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) **Function Description:** The TSTACKSIZE system variable is used to control the height of fraction of stack text relative to the current height percentage of selected text. | | | | --- | --- | | Type | Integer | | Saved in | Drawing | | Initial value | 70 | | Range | 25 ~ 125 | --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables/TSTACKSIZE.html) · © Gstarsoft Co., Ltd.