Specific methods: Open Word Software -Word Page-Tools-Customize-Options-Select "Display Common Toolbars and Formatted Toolbars in Two Lines"-Close. At this point, the selection keys of superscript and subscript in X2 are displayed in the upper right corner of the word toolbar. If you want to check [1], you can check [1] at the back of the text, then drag it black with the mouse, then use the mouse to click X2(2 is the upper right corner, there is no way to express it here), and use the punctuation X2(2 is the lower right corner).