| handle | Data.GraphViz.Exception |
| hang | Data.GraphViz.Printing |
| hasClusters | Data.GraphViz.Types.Graph |
| HBottom | Data.GraphViz.Attributes.HTML |
| hcat | Data.GraphViz.Printing |
| HCenter | Data.GraphViz.Attributes.HTML |
| HeadClip | Data.GraphViz.Attributes.Complete |
| HeadLabel | Data.GraphViz.Attributes.Complete |
| HeadPort | Data.GraphViz.Attributes.Complete |
| HeadTarget | Data.GraphViz.Attributes.Complete |
| HeadTooltip | Data.GraphViz.Attributes.Complete |
| HeadURL | Data.GraphViz.Attributes.Complete |
| Head_LP | Data.GraphViz.Attributes.Complete |
| Height | |
| 1 (Data Constructor) | Data.GraphViz.Attributes.HTML |
| 2 (Data Constructor) | Data.GraphViz.Attributes.Complete |
| height | Data.GraphViz.Attributes.Complete |
| Hexagon | Data.GraphViz.Attributes.Complete, Data.GraphViz.Attributes, Data.GraphViz |
| hGetDot | Data.GraphViz.Commands.IO |
| hGetStrict | Data.GraphViz.Commands.IO |
| Hier | Data.GraphViz.Attributes.Complete |
| HierConstraints | Data.GraphViz.Attributes.Complete |
| HLeft | Data.GraphViz.Attributes.HTML |
| HMiddle | Data.GraphViz.Attributes.HTML |
| HoneyDew | Data.GraphViz.Attributes.Colors.X11, Data.GraphViz.Attributes, Data.GraphViz |
| Honeydew | Data.GraphViz.Attributes.Colors.SVG |
| HoneyDew1 | Data.GraphViz.Attributes.Colors.X11, Data.GraphViz.Attributes, Data.GraphViz |
| HoneyDew2 | Data.GraphViz.Attributes.Colors.X11, Data.GraphViz.Attributes, Data.GraphViz |
| HoneyDew3 | Data.GraphViz.Attributes.Colors.X11, Data.GraphViz.Attributes, Data.GraphViz |
| HoneyDew4 | Data.GraphViz.Attributes.Colors.X11, Data.GraphViz.Attributes, Data.GraphViz |
| HorizontalRule | Data.GraphViz.Attributes.HTML |
| HotPink | |
| 1 (Data Constructor) | Data.GraphViz.Attributes.Colors.X11, Data.GraphViz.Attributes, Data.GraphViz |
| 2 (Data Constructor) | Data.GraphViz.Attributes.Colors.SVG |
| HotPink1 | Data.GraphViz.Attributes.Colors.X11, Data.GraphViz.Attributes, Data.GraphViz |
| HotPink2 | Data.GraphViz.Attributes.Colors.X11, Data.GraphViz.Attributes, Data.GraphViz |
| HotPink3 | Data.GraphViz.Attributes.Colors.X11, Data.GraphViz.Attributes, Data.GraphViz |
| HotPink4 | Data.GraphViz.Attributes.Colors.X11, Data.GraphViz.Attributes, Data.GraphViz |
| House | Data.GraphViz.Attributes.Complete, Data.GraphViz.Attributes, Data.GraphViz |
| hPutCompactDot | Data.GraphViz.Commands.IO |
| hPutDot | Data.GraphViz.Commands.IO |
| HRef | Data.GraphViz.Attributes.HTML |
| HRight | Data.GraphViz.Attributes.HTML |
| hsep | Data.GraphViz.Printing |
| HSV | Data.GraphViz.Attributes.Colors, Data.GraphViz.Attributes.Complete |
| HTable | Data.GraphViz.Attributes.HTML |
| HText | Data.GraphViz.Attributes.HTML |
| HtmlLabel | Data.GraphViz.Attributes.Complete |
| HTop | Data.GraphViz.Attributes.HTML |
| hue | Data.GraphViz.Attributes.Colors, Data.GraphViz.Attributes.Complete |
| hVal | Data.GraphViz.Attributes.Complete |