Items known by CurrentValue
Other answers have already suggested ways of querying options. There's no way of systematically generating a list of all string values, but it's not too difficult to put together a list of all of the values which are used by Wolfram Research in Mathematica itself. If you look in the various files in these locations:
$InstallationDirectory/SystemFiles/FrontEnd/StyleSheets$InstallationDirectory/SystemFiles/FrontEnd/TextResources$InstallationDirectory/SystemFiles/FrontEnd/SystemResources
for instances of CurrentValue, you'll get a pretty good list of what is in active use by Wolfram Research developers at any given time. Most of the undocumented string values are created specifically to fulfill a purpose required by one of these files, so that's a pretty good list.
There may be a few others used directly by the kernel but not anywhere in these files, but if so, not many. Any undocumented string values which are not in use by the product somewhere are likely to be untested as well, so if you're tempted to complain that this list isn't absolutely complete, be careful what you wish for.
Perhaps: using
systemnames = Names["System`*"];
Select[systemnames, CurrentValue[#] =!= $Failed &];
CurrentValue /@ % // Short
(*
==> {False, {FrontEnd`FileName[{$UserBaseDirectory, "Autoload"}], ... }
*)
for the System` context, and replacing System with the appropriate context name for other members of the list Contexts[]?
These String items were directly read from the 10.0.2 Front End, including quite a few not listed elsewhere in this Q&A:
{"AltKey", "ByteCount", "CellChangeTimesList", "CellCount", "CellStyleName",
"CodeContext", "CommandKey", "ConnectedControllers", "ControlKey", "ControllerData",
"ControllerState", "ControlsFontFamily", "ControlsFontSize", "CounterValue",
"CurrentFormatTime", "CurrentLocatorPaneThumb", "DefaultButtonSize",
"DefaultHelpViewerWindowMargins", "DefaultHelpViewerWindowSize", "DefaultWindowSize",
"DialogCanClose", "DocumentAndWindowSize", "DocumentSize", "EventAbsoluteTime",
"EventData", "EventKey", "FontAscenderHeight", "FontAxisOffset", "FontCapHeight",
"FontDescenderDepth", "FontLineHeight", "FontLowercaseAscenderHeight", "FontMWidth",
"FontNWidth", "FontThickness", "FontXHeight", "FullScreenArea", "GraphicsSelectionType",
"HasHandwritingInput", "HasSystemFullScreenButton", "HasTouchscreen",
"HyperlinkModifierKey", "InternetConnectionAvailable", "KeyboardKeys",
"LicenseValid", "LocalFileSystemAccessAllowed", "MaxCounterValue",
"MenuFontFamily", "MenuFontSize", "ModifierKeys", "MouseButtons", "MouseButtonTest",
"MouseClickCount", "MouseOver", "MousePosition", "NetworkConnectionAvailable",
"NotebookDirectory", "NotebookEvaluationPending", "NotebookFileName",
"NotebookFullFileName", "NotebookSelected", "OptionKey", "PanelBackground",
"PanelFontFamily", "PanelFontSize", "PluginEnabled", "PluginParameters",
"PreferredHandedness", "PreviousFormatTime", "PrimaryScreenSize", "RightClickData",
"RunningEvaluator", "ScreenArea", "ScreenBitDepth", "ScreenInformation",
"ScreenResolution", "SelectionData", "SelectionOver", "ShiftKey",
"ShutdownSynchronization", "StoredWolframIdCredentials", "StyleDefinitions",
"SynchronizationType", "SyntaxColoringReasons", "SystemColor", "TimeUsed",
"ToolbarBackground", "TooltipFontFamily", "TooltipFontSize", "TooltipFrameMargins",
"TouchPosition", "UserInteractionEnabled", "WindowResolution",
"WolframCloudActivityQueueStatus", "WolframCloudConnected", "WolframCloudFullUserName",
"WolframCloudLoginError", "WolframCloudSyncState", "WolframCloudUILogin",
"WolframCloudUserName", "WolframCloudUserUUID", "WordCount"}
Using a modified version of Rojo's method, adapted to correctly handle appearances of the CurrentValue[obj, item] form, in Mathematica 10.0.2 these additional items not listed above were found:
{"AlignmentGuidesEnabled", "AllowDataUpdates", "AllowDocumentationUpdates",
"AllowDownloads", "AutoQuoteCharacters", "BlinkingCellInsertionPoint",
"CaseSensitiveCommandCompletion", "CellChangeTimeMergeInterval", "CodeAssistOptions",
"DebuggerSettings", "DefaultNewGraphics", "DialogSettings", "DisplayImagePixels",
"Graphics3DBoxOptionsClipPlanes", "Graphics3DBoxOptionsClipPlanesStyle",
"Graphics3DBoxOptionsImageSize", "Graphics3DBoxOptionsPlotRange",
"GraphicsBoxOptionsImageSize", "GraphicsBoxOptionsImageSizeRaw", "IsPersistent2DTool",
"MarkerAspectRatio", "MarkerLineThickness", "NotebookSecurityOptions",
"NotebooksMenuHistoryLength", "PasteAutoQuoteCharacters", "PersistentTools",
"PreferencesSettings", "Raster3DBoxOptionsPlotRange",
"Raster3DBoxOptionsPlotRangeClipPlanesStyle", "RasterExploreViewRange", "SelectedTool",
"ShowPredictiveInterface", "TrackCellChangeTimes", "VersionedPreferences",
"WolframCloudSettings", AutoMultiplicationSymbol, AutoNumberFormatting,
FrontEnd`AutoOpenPaclets, AutoStyleOptions, ButtonBoxOptions, cache,
CommonDefaultFormatTypes, ConversionOptions, FrontEnd`Current2DTool, DefaultNewCellStyle,
DigitBlock, DigitBlockMinimum, DragAndDrop, Enabled, Evaluatable, Evaluator,
EvaluatorNames, FindSettings, Graphics3DBoxOptions, HomePage, Language, Magnification,
MessageOptions, NewPrimitiveStyle, NotebookConvertSettings, NotebooksMenu,
NumberMultiplier, NumberPoint, NumberSeparator, option, OutputSizeLimit, PageFooterLines,
PageFooters, PageHeaderLines, PageHeaders, $CellContext`pos$$, PrintAction,
PrintingOptions, PrintingStartingPageNumber, PrintPrecision, PrivateFrontEndOptions,
PrivateNotebookOptions, RenderingOptions, FrontEnd`RightClickData, RulerUnits,
ScreenStyleEnvironment, ShowCellLabel, ShowCursorTracker, ShowGroupOpenCloseIcon,
ShowSyntaxStyles, StyleDefinitions, StyleNameDialogSettings, TaggingRules, Visible,
WindowMargins, WindowSize, WindowStatusArea, WindowTitle}
Further these item specifications were found, grouped by item:
{"AutoStyleOptions", "FormattingErrorTooltips"}
{"AutoStyleOptions", "HighlightComments"}
{"AutoStyleOptions", "HighlightEmphasizedSyntaxErrors"}
{"AutoStyleOptions", "HighlightExcessArguments"}
{"AutoStyleOptions", "HighlightFormattingErrors"}
{"AutoStyleOptions", "HighlightFunctionLocalVariables"}
{"AutoStyleOptions", "HighlightLocalScopeConflicts"}
{"AutoStyleOptions", "HighlightLocalVariables"}
{"AutoStyleOptions", "HighlightMissingArguments"}
{"AutoStyleOptions", "HighlightOrderOfEvaluationConflicts"}
{"AutoStyleOptions", "HighlightPatternVariables"}
{"AutoStyleOptions", "HighlightStrings"}
{"AutoStyleOptions", "HighlightSymbolShadowing"}
{"AutoStyleOptions", "HighlightSyntaxErrors"}
{"AutoStyleOptions", "HighlightUndefinedSymbols"}
{"AutoStyleOptions", "HighlightUnknownOptions"}
{"AutoStyleOptions", "HighlightUnwantedAssignments"}
{"AutoStyleOptions", "CommentStyle", FontColor}
{"AutoStyleOptions", "EmphasizedSyntaxErrorStyle", Background}
{"AutoStyleOptions", "EmphasizedSyntaxErrorStyle", FontColor}
{"AutoStyleOptions", "EmphasizedSyntaxErrorStyle", FontSize}
{"AutoStyleOptions", "ExcessArgumentStyle", FontColor}
{"AutoStyleOptions", "FunctionLocalVariableStyle", FontColor}
{"AutoStyleOptions", "LocalScopeConflictStyle", FontColor}
{"AutoStyleOptions", "LocalVariableStyle", FontColor}
{"AutoStyleOptions", "MissingArgumentStyle", FontColor}
{"AutoStyleOptions", "OrderOfEvaluationConflictStyle", FontColor}
{"AutoStyleOptions", "PatternVariableStyle", FontColor}
{"AutoStyleOptions", "PatternVariableStyle", FontSlant}
{"AutoStyleOptions", "StringStyle", FontColor}
{"AutoStyleOptions", "SymbolShadowingStyle", FontColor}
{"AutoStyleOptions", "SyntaxErrorStyle", FontColor}
{"AutoStyleOptions", "UndefinedSymbolStyle", FontColor}
{"AutoStyleOptions", "UnknownOptionStyle", FontColor}
{"AutoStyleOptions", "UnwantedAssignmentStyle", FontColor}
{"ButtonBoxOptions", ButtonData}
{"ByteCount", $CellContext`selectionOnly$$}
{"CellChangeTimesList", $CellContext`selectionOnly$$}
{"CellCount", False}
{"CellCount", True}
{"CodeAssistOptions", "AutoConvertEnable"}
{"CodeAssistOptions", "AutoPopupDelay"}
{"CodeAssistOptions", "AutoPopupEnable"}
{"CodeAssistOptions", "DynamicHighlighting"}
{"CodeAssistOptions", "FloatingElementDelay"}
{"CodeAssistOptions", "FloatingElementEnable"}
{"CodeAssistOptions", "HeadHighlightStyle", Background}
{"CodeAssistOptions", "MatchHighlightStyle", Background}
{"CommonDefaultFormatTypes", "Input"}
{"CommonDefaultFormatTypes", "Output"}
{"ControllerData", {"Gamepad", "Joystick", "Multi-AxisController"}}
{"ControlsFontSize", Large}
{"ControlsFontSize", Medium}
{"ControlsFontSize", Small}
{"ControlsFontSize", Tiny}
{"ConversionOptions", "ExportOptions", "BMP"}
{"ConversionOptions", "ExportOptions", "EPS"}
{"ConversionOptions", "ExportOptions", "GIF"}
{"ConversionOptions", "ExportOptions", "JPEG"}
{"ConversionOptions", "ExportOptions", "JPEG2000"}
{"ConversionOptions", "ExportOptions", "Package"}
{"ConversionOptions", "ExportOptions", "PDF"}
{"ConversionOptions", "ExportOptions", "PNM"}
{"ConversionOptions", "ExportOptions", "SVG"}
{"ConversionOptions", "ExportOptions", "TeX"}
{"ConversionOptions", "ExportOptions", "TIFF"}
{"ConversionOptions", "ExportOptions", "XHTML"}
{"ConversionOptions", "ExportOptions", "XHTMLMathML"}
{"ConversionOptions", "ImportOptions", "GIF"}
{"ConversionOptions", "ImportOptions", "JPEG"}
{"ConversionOptions", "ImportOptions", "Package"}
{"ConversionOptions", "ImportOptions", "PDF"}
{"ConversionOptions", "ImportOptions", "Text"}
{"ConversionOptions", "ImportOptions", "TIFF"}
{"ConversionOptions", "ExportOptions", "GIF", "Background"}
{"ConversionOptions", "ExportOptions", "GIF", "Transparency"}
{"ConversionOptions", "ExportOptions", "JPEG2000", "ImageEncoding"}
{"ConversionOptions", "ExportOptions", "TIFF", "ColorSeparation"}
{"ConversionOptions", "ExportOptions", "TIFF", "DifferencePredictor"}
{"ConversionOptions", "ExportOptions", "XHTML", "ConvertClosed"}
{"ConversionOptions", "ExportOptions", "XHTML", "ConvertReverseClosed"}
{"ConversionOptions", "ExportOptions", "XHTML", "CSSFile"}
{"ConversionOptions", "ExportOptions", "XHTML", "CSSInclude"}
{"ConversionOptions", "ExportOptions", "XHTML", "CSSRadio"}
{"ConversionOptions", "ExportOptions", "XHTML", "MathOutput"}
{"ConversionOptions", "ExportOptions", "XHTMLMathML", "ConvertClosed"}
{"ConversionOptions", "ExportOptions", "XHTMLMathML", "ConvertReverseClosed"}
{"ConversionOptions", "ExportOptions", "XHTMLMathML", "CSSFile"}
{"ConversionOptions", "ExportOptions", "XHTMLMathML", "CSSInclude"}
{"ConversionOptions", "ExportOptions", "XHTMLMathML", "CSSRadio"}
{"ConversionOptions", "ImportOptions", "PDF", "Editable"}
{"ConversionOptions", "ImportOptions", "PDF", "Pages"}
{"ConversionOptions", "ImportOptions", "Text", "ReadingType"}
{"CounterValue", "SlideShowNavigationBar"}
{"DebuggerSettings", "BreakOnAllMessages"}
{"DebuggerSettings", "BreakOnAsserts"}
{"DebuggerSettings", "BreakpointsGroup"}
{"DebuggerSettings", "DebuggerEnabled"}
{"DebuggerSettings", "HighlightBreakpoints"}
{"DebuggerSettings", "HighlightEvaluatorPosition"}
{"DebuggerSettings", "HighlightStackFrames"}
{"DebuggerSettings", "MessageBreakpointsGroup"}
{"DebuggerSettings", "ShowBreakpoints"}
{"DebuggerSettings", "ShowStack"}
{"DebuggerSettings", "WatchpointsGroup"}
{"DebuggerSettings", "BreakpointStyle", Background}
{"DebuggerSettings", "BreakpointStyle", FontColor}
{"DebuggerSettings", "EvaluatorPositionHighlightStyle", Background}
{"DebuggerSettings", "EvaluatorPositionHighlightStyle", FontColor}
{"DebuggerSettings", "StackHighlightStyle", Background}
{"DebuggerSettings", "StackHighlightStyle", FontColor}
{"DialogSettings", "Install", "Type"}
{"DigitBlock", 1}
{"DigitBlock", 2}
{"DigitBlockMinimum", 1}
{"DigitBlockMinimum", 2}
{"FindSettings", "FindBoxes"}
{"FindSettings", "FindHistory"}
{"FindSettings", "IgnoreCase"}
{"FindSettings", "ReplaceBoxes"}
{"FindSettings", "ReplaceHistory"}
{"FindSettings", "WholeWord"}
{"FindSettings", "Wraparound"}
{"FindSettings", WindowMargins}
{"FindSettings", WindowOpacity}
{"FindSettings", WindowSize}
{"Graphics3DBoxOptions", "RotationAction"}
{"Graphics3DBoxOptionsClipPlanes", $CellContext`i$}
{"Graphics3DBoxOptionsClipPlanes", $CellContext`j$}
{"Graphics3DBoxOptionsClipPlanes", $CellContext`i$, 4}
{"Graphics3DBoxOptionsClipPlanes", $CellContext`j$, 4}
{"Graphics3DBoxOptionsClipPlanesStyle", $CellContext`i$}
{"Graphics3DBoxOptionsClipPlanesStyle", $CellContext`j$}
{"MaxCounterValue", "SlideShowNavigationBar"}
{"MessageOptions", "CompatibilityToolWarning"}
{"MessageOptions", "ConsoleMessageAction"}
{"MessageOptions", "ErrorAction"}
{"MessageOptions", "KernelMessageAction"}
{"MessageOptions", "WarningAction"}
{"ModifierKeys", "Command"}
{"NewPrimitiveStyle", Arrowheads}
{"NewPrimitiveStyle", Background}
{"NewPrimitiveStyle", CapForm}
{"NewPrimitiveStyle", Dashing}
{"NewPrimitiveStyle", DrawEdges}
{"NewPrimitiveStyle", DrawFrontFaces}
{"NewPrimitiveStyle", EdgeCapForm}
{"NewPrimitiveStyle", EdgeColor}
{"NewPrimitiveStyle", EdgeDashing}
{"NewPrimitiveStyle", EdgeJoinForm}
{"NewPrimitiveStyle", EdgeOpacity}
{"NewPrimitiveStyle", EdgeThickness}
{"NewPrimitiveStyle", FontColor}
{"NewPrimitiveStyle", FontFamily}
{"NewPrimitiveStyle", FontOpacity}
{"NewPrimitiveStyle", FontSize}
{"NewPrimitiveStyle", FontSlant}
{"NewPrimitiveStyle", FontWeight}
{"NewPrimitiveStyle", FrontFaceColor}
{"NewPrimitiveStyle", FrontFaceOpacity}
{"NewPrimitiveStyle", GraphicsColor}
{"NewPrimitiveStyle", JoinForm}
{"NewPrimitiveStyle", LineColor}
{"NewPrimitiveStyle", LineOpacity}
{"NewPrimitiveStyle", Opacity}
{"NewPrimitiveStyle", PointSize}
{"NewPrimitiveStyle", TextAlignment}
{"NewPrimitiveStyle", TextJustification}
{"NewPrimitiveStyle", Thickness}
{"NewPrimitiveStyle", FontVariations, "Underline"}
{"NewPrimitiveStyle", InsetBoxOptions, Alignment}
{"NewPrimitiveStyle", RectangleBoxOptions, RoundingRadius}
{"NewPrimitiveStyle", InsetBoxOptions, Alignment, 2}
{"NotebookConvertSettings", "GenerateBitmapCaches"}
{"NotebookConvertSettings", "InputToStandardForm"}
{"NotebookConvertSettings", "OutputToStandardForm"}
{"NotebookConvertSettings", "PreserveStyleSheet"}
{"NotebookSecurityOptions", "TrustByDefault"}
{"NotebookSecurityOptions", str}
{"PageFooterLines", 1}
{"PageFooterLines", 2}
{"PageFooterLines", $CellContext`currentPage$$}
{"PageFooters", 1, 1}
{"PageFooters", 1, 2}
{"PageFooters", 1, 3}
{"PageFooters", 2, 1}
{"PageFooters", 2, 2}
{"PageFooters", 2, 3}
{"PageFooters", 2, $CellContext`currentPosition$$[2, "Footer"]}
{"PageFooters", $CellContext`currentPage$$, $CellContext`currentPosition$$[$CellContext`currentPage$$, "Footer"]}
{"PageHeaderLines", 1}
{"PageHeaderLines", 2}
{"PageHeaderLines", $CellContext`currentPage$$}
{"PageHeaders", 1, 1}
{"PageHeaders", 1, 2}
{"PageHeaders", 1, 3}
{"PageHeaders", 2, 1}
{"PageHeaders", 2, 2}
{"PageHeaders", 2, 3}
{"PageHeaders", 2, $CellContext`currentPosition$$[2, "Header"]}
{"PageHeaders", $CellContext`currentPage$$, $CellContext`currentPosition$$[$CellContext`currentPage$$, "Header"]}
{"PreferencesSettings", "Page"}
{"PreferencesSettings", "UseTextFormattingWhenConvertingInput"}
{"PreferencesSettings", "UseTextFormattingWhenConvertingOutput"}
{"PrintingOptions", "FacingPages"}
{"PrintingOptions", "FirstPageFace"}
{"PrintingOptions", "FirstPageFooter"}
{"PrintingOptions", "FirstPageHeader"}
{"PrintingOptions", "OpacityRenderingMethod"}
{"PrintingOptions", "RasterizationResolution"}
{"PrintingOptions", "VertexColorRenderingMethod"}
{"PrivateFrontEndOptions", "LastRegistrationReminderDate"}
{"PrivateFrontEndOptions", "LicensesAgreed"}
{"PrivateFrontEndOptions", "ShowAtStartup"}
{"PrivateFrontEndOptions", "WolframAlphaSettings"}
{"PrivateFrontEndOptions", "WolframAlphaSettings", "BaseURL"}
{"PrivateFrontEndOptions", "WolframAlphaSettings", "SendMathematicaSessionInfo"}
{"PrivateFrontEndOptions", "DialogSettings", "DrawingTools", "ArrowsOpener"}
{"PrivateFrontEndOptions", "DialogSettings", "DrawingTools", "FillOpener"}
{"PrivateFrontEndOptions", "DialogSettings", "DrawingTools", "OperationsOpener"}
{"PrivateFrontEndOptions", "DialogSettings", "DrawingTools", "PointsOpener"}
{"PrivateFrontEndOptions", "DialogSettings", "DrawingTools", "RectanglesOpener"}
{"PrivateFrontEndOptions", "DialogSettings", "DrawingTools", "SettingsOpener"}
{"PrivateFrontEndOptions", "DialogSettings", "DrawingTools", "StrokeOpener"}
{"PrivateFrontEndOptions", "DialogSettings", "DrawingTools", "TextOpener"}
{"PrivateFrontEndOptions", "DialogSettings", "DrawingTools", "ToolsOpener"}
{"PrivateFrontEndOptions", "DialogSettings", "DrawingTools", WindowMargins}
{"PrivateFrontEndOptions", "DialogSettings", "HeadersFooters", "DateFormat"}
{"PrivateFrontEndOptions", "DialogSettings", "HeadersFooters", "Dialogs"}
{"PrivateFrontEndOptions", "DialogSettings", "HeadersFooters", "PageNumberFormat"}
{"PrivateFrontEndOptions", "DialogSettings", "InsertCitation", WindowMargins}
{"PrivateFrontEndOptions", "DialogSettings", "InsertCitation", WindowSize}
{"PrivateFrontEndOptions", "DialogSettings", "InsertCitationNote", WindowMargins}
{"PrivateFrontEndOptions", "DialogSettings", "InsertCitationNote", WindowSize}
{"PrivateFrontEndOptions", "DialogSettings", "Install", "Source"}
{"PrivateFrontEndOptions", "DialogSettings", "Install", "Type"}
{"PrivateFrontEndOptions", "InterfaceSettings", "ImageEditingToolbar", "QueryHistory"}
{"PrivateFrontEndOptions", "DialogSettings", "Preferences", "SubTabs", "Appearance"}
{"PrivateFrontEndOptions", "DialogSettings", "Preferences", "SubTabs", "SyntaxColoring"}
{"PrivateNotebookOptions", "FinalWindowPrompt"}
{"PrivateNotebookOptions", "JournalStyle"}
{"PrivateNotebookOptions", "NoteStyle"}
{"PrivateNotebookOptions", "SafeFileOpen"}
{"PrivateNotebookOptions", "VersionedStylesheet"}
{"Raster3DBoxOptionsPlotRange", $CellContext`i$}
{"Raster3DBoxOptionsPlotRange", $CellContext`i$, 1}
{"Raster3DBoxOptionsPlotRange", $CellContext`i$, 2}
{"RenderingOptions", "HardwareAntialiasingQuality"}
{"SystemColor", "DialogText"}
{"SystemColor", "DialogTextDisabled"}
{"SystemColor", "Menu"}
{"SystemColor", "MenuText"}
{"SystemColor", "Tooltip"}
{"SystemColor", "TooltipFrame"}
{"SystemColor", "TooltipText"}
{"TaggingRules", "ActivationState"}
{"TaggingRules", "ColorType"}
{"TaggingRules", "DefaultWindowSize"}
{"TaggingRules", "DisableController"}
{"TaggingRules", "ErrorMessage"}
{"TaggingRules", "ExampleCounter"}
{"TaggingRules", "FoundExpression"}
{"TaggingRules", "Highlight"}
{"TaggingRules", "Image3DEditor"}
{"TaggingRules", "ImageEditor"}
{"TaggingRules", "index"}
{"TaggingRules", "InputNotebook"}
{"TaggingRules", "length"}
{"TaggingRules", "NotebookID"}
{"TaggingRules", ScrollPosition}
{"TaggingRules", WindowSize}
{"TaggingRules", "SlideshowSettings", "Toolbar"}
{"TaggingRules", "SlideshowSettings", "WindowElements"}
{"WindowSize", 1}
{"WindowSize", 2}
{"WolframCloudSettings", "ActivityMonitorWindowMargins"}
{"WolframCloudSettings", "ActivityMonitorWindowSize"}
{"WolframCloudSettings", "OpenDialogWindowMargins"}
{"WolframCloudSettings", "OpenDialogWindowSize"}
{"WolframCloudSettings", "SaveDialogWindowMargins"}
{"WolframCloudSettings", "SaveDialogWindowSize"}