• R cad commands

    RAY Creates a semi-infinite line
    RECOVER Repairs a damaged drawing
    RECTANG Draws a rectangular polyline
    REDEFINE Restores AutoCAD internal commands overridden by UNDEFINE
    REDO Reverses the effects of the previous UNDO or U command

    REDRAW Refreshes the display in the current viewport
    REDRAWALL Refreshes the display in all viewports
    REFCLOSE Saves back or discards changes made during in-place editing of a reference (an xref or a block)
    REFEDIT Selects a reference for editing
    REFSET Adds or removes objects from a working set during in-place editing of a reference (an xref or a block)
    REGEN Regenerates the drawing and refreshes the current viewport
    REGENALL Regenerates the drawing and refreshes all viewports
    REGENAUTO Controls automatic regeneration of a drawing
    REGION Creates a region object from a selection set of existing objects
    REINIT Reinitializes the digitizer, digitizer input/output port, and program parameters file
    RENAME Changes the names of objects
    RENDER Creates a photorealistic or realistically shaded image of a three-dimensional wireframe or solid model
    RENDSCR Redisplays the last rendering created with the RENDER command
    REPLAY Displays a BMP, TGA, or TIFF image
    RESUME Continues an interrupted script
    REVOLVE Creates solids by revolving two-dimensional objects about an axis

    REVSURF Creates a revolved surface about a selected axis
    RMAT Manages rendering materials
    ROTATE Moves objects about a base point
    ROTATE3D Moves objects about a three-dimensional axis
    RPREF Sets rendering preferences
    RSCRIPT Creates a script that repeats continuously
    RULESURF Creates a ruled surface between two curves