Hztxt.shx ●

When this font is missing, text within drawings often appears as question marks, ruined formatting, or empty spaces. This article provides a comprehensive overview of what hztxt.shx is, why it is critical, how to install it, and how to troubleshoot common issues associated with it. What is hztxt.shx?

Thousands of engineers built entire careers with hztxt.shx living in C:\Program Files\AutoCAD\Fonts\ . It was passed down from senior to junior like a sacred text.

Open your drawing again. The Chinese characters should now display correctly. Chinese font change to question mark - Autodesk hztxt.shx

This became the most common technical support question in Chinese CAD forums:

To function correctly, hztxt.shx is used in conjunction with a standard Western font (usually Txt.shx , Romans.shx , or Isocp.shx ). In AutoCAD’s Style dialog, this is handled via the "Big Font" setting. When this font is missing, text within drawings

To write notes, dimensions, or specifications in Chinese, a CAD user would see only gibberish: ╩╓╗·╩╘╤Θ . The software lacked the thousands of Chinese character glyphs required.

Autodesk never officially released hztxt.shx . It spread like wildfire through floppy disks, CD-ROMs, and early bulletin board systems (BBS). It became the de facto standard among Chinese architects, civil engineers, and mechanical designers. Thousands of engineers built entire careers with hztxt

Today, if you download any "Chinese CAD font pack" from a forum, hztxt.shx is always included. It sits alongside gbcbig.shx , tssdeng.shx , and hztxt_e.shx . It is a cultural artifact of China's rapid industrialization—a tiny file that represents the ingenuity of engineers who refused to let a language barrier stop them from building skyscrapers, bridges, and factories.

When a user configures a text style, they might select Romans.shx for the primary font and check the "Use Big Font" box, selecting hztxt.shx as the Big Font. This tells the software: “If the character is English, use Romans geometry. If the character is Chinese, use hztxt geometry.” This seamless switching allows for bilingual drawings without the jarring visual clash of mixing two entirely different font families.