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Some users, while using CAD mobile software to view drawings, have noticed that certain text in the CAD drawings appears as “?” ”, just like in the image below, what’s going on here? How should such problems be solved? Next, I’ll share with you information about the CAD mobile viewing software Haochen CAD ViewKing – in this software, the text on the drawings appears as “?” ”The reasons and solutions! In fact, the question mark appearing on the drawing does not indicate a problem with the drawing itself; it is usually caused by the absence of a font. The solution is also very simple: simply manually add the missing font files, and it will display properly! The specific steps are as follows: First, open the Haocheng CAD Viewer software on your smartphone, then open the drawing file with the issue; a 【Missing Font】message box will appear, and you need to copy the text from that message box. Next, download these missing fonts to your phone, and locate the fonts folder within the phone’s system folder (the path is: root directory >> 0 >> GstarCAD >> fonts). Copy the downloaded fonts into this fonts folder, then open the software’s settings section to add the missing fonts. After that, close the Haocen CAD software and reopen the drawing. As shown in the figure below: That’s all; in the CAD mobile viewing software Haocheng CAD ViewKing, the text on the drawings appears as “?” ”The reasons and solutions – it’s quite simple, right? It’s a problem that can be solved in 10 seconds; write it down in your notebook.