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Many beginners who are just starting to learn CAD are not very familiar with how CAD shortcut keys are categorized Thanks to the extensive functions of HaoChen CAD software, software engineers have defined various shortcut keys and established distinctions between them. This article will help you become an expert in the industry even further. 1. CAD function keys: Function keys are a set of keys located on the keyboard. Both in operating systems and CAD software, certain functions are pre-set. For example, the F1 key that we usually use will bring up the help document interface in a CAD software environment. As shown in the figure below: 2. CAD combination shortcuts – Since there are only 12 function keys available, and CAD software has many common functions, combination keys are used to create shortcuts for these functions. Combining function keys means pressing multiple keys at the same time to execute related commands. We can save a DWG drawing under a different name or at a different path using the \"Save As\" command, which can be accessed by combining the shortcut keys Ctrl + Shift + S. As shown in the figure below: 3. CAD command shortcuts – The command shortcuts in CAD refer to the shortcuts for commands related to drawing, modifying, processing graphics, and setting parameters in the CAD environment. For example, the L command for drawing a line when executed in the command line can be used to draw a line. As shown in the figure below, the shortcut keys for commands are primarily designed for use by designers; therefore, depending on individual preferences, the configuration of these shortcut keys is more diverse and flexible compared to other categories, and the number of single-byte shortcuts proves to be insufficient. Through examples, such as using the mirror shortcut key mi (the original command is mirror), the axisymmetric mirroring function can be achieved. This approach uses multi-byte shortcuts, enabling more command combinations than single-byte shortcuts. As shown in the figure below: The above are the introductory tips on CAD shortcut key categories summarized in the HaoChen CAD software. Overall, we now have a basic understanding of the distinction and usage of function keys, shortcut keys, and character shortcuts in CAD keybindings.