• u cad commands

    U
    U Reverses the most recent operation
    UCS Manages user coordinate systems
    UCSICON Controls the visibility and placement of the UCS icon
    UCSMAN Manages defined user coordinate systems
    UNDEFINE Allows an application-defined command to override an internal AutoCAD command
    UNDO Reverses the effect of commands
    UNION Creates a composite region or solid by addition
    UNITS Controls coordinate and angle display formats and determines precision

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