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In HaoChen CAD, stacking text means arranging text one above the other, such as for subscripts and superscripts, or for fractions and formulas. How exactly is it used? Next, I’ll give you a detailed introduction to the aspects related to stacking text in the CAD quick-start tutorial! If you need to enter subscripts such as squares or cubes, or fractions, you can use CAD’s multi-line text stacking feature, which is the button available in the multi-line text editor dialog box. There are three settings for the stacking symbol: “^”, “/” and “#”. By adding one of these symbols before or after the text, selecting both the symbol and the text together, and then clicking the stacking button, it is possible to create superscripts, subscripts, and fractional notation. For example, if you enter “2^”, select these two characters and then click the stack button to obtain the square result. If you enter “^2”, select these two characters and then click the stack button to achieve the subscript effect. If you enter “2^3”, select these three characters and click the stack button, the result will be 2 at the top and 3 at the bottom. If you want to enter the square of 3, you need to type “32^”, and then only “2^” can be selected for stacking. The other two stacking symbols can generate fractions with slashes or hyphens; you can give them a try. As shown in the figure below: the lower version displays a toolbar for the multi-line text editor, with functions similar to those of the panel in the higher version, and the button icons are the same. The effect after stacking is shown in the figure below: if a tolerance is specified, stacking the text is clearly the best option; whereas for simple operations such as squaring or cubing, using stacking for input becomes rather cumbersome. There are even simpler ways to enter squares and cubes; right-click in a multi-line text editor, and you can find various symbols such as those for squares and cubes in the “Symbols” list in the right-click menu – just select them from the list, as shown in the figure below. If you can remember the codes for these symbols, you can also type \u+00B2 and \u+00B3 directly in a multi-line text editor. If the font you select is a TTF font built into the operating system, such as SimSun, you can also enter the encoding directly in single-line text. Some SHX fonts allow the use of control codes to insert symbols such as %%u (underscore), %%d (degrees), %%c (diameter), %131 (reinforcement symbol), and so on within a single line of text. Some fonts also support the use of superscripts and subscripts; for example, in the commonly used tssdeng.shx font, entering %%141 makes the following characters become superscripts, until %%141 is entered again to end this format. Entering %%142 then allows subscripts to be used, as shown in the figure below. If a different font is used, the superscript and subscript effects will disappear. To use subscripting and certain special characters in single-line text input, it is necessary to know what effects different codes in the font correspond to; if no relevant information is available, one has to try them out one by one. Although single-line text can support subscripts and superscripts, to achieve a stacked effect, it has to be written as several separate pieces of text. The above are the tips for using stacked text in Haochen CAD; I hope they will be helpful to those who are just starting to learn CAD!