RegionBoundaryStyle
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RegionBoundaryStyle
is an option for plotting functions that specifies the boundary style for the region over which the plot is being drawn.
Details

- RegionBoundaryStyle is typically used for plots that contain discrete elements, to better show the full region of the plot.
- The region being styled may come from a variable specification, RegionFunction or a combination of sources.
- The following settings can be used:
-
Automatic automatically style the region boundary None omit the region boundary style draw with specified graphics directives - With RegionBoundaryStyle->Automatic, regions that completely fill the plot will generally not be drawn.
Examples
open allclose allBasic Examples (3)Summary of the most common use cases
Automatically style the plotted region:

https://wolfram.com/xid/0k74oqres9w9a-fc6de0

Omit the boundary of the region:

https://wolfram.com/xid/0k74oqres9w9a-7ish35

Automatic will style the region in ContourPlot3D:

https://wolfram.com/xid/0k74oqres9w9a-qjk7o7

Scope (5)Survey of the scope of standard use cases
Use a black boundary for the region:

https://wolfram.com/xid/0k74oqres9w9a-wofgza

Style the region from a region function:

https://wolfram.com/xid/0k74oqres9w9a-1x0pxo

By default, the boundary is not shown for full regions:

https://wolfram.com/xid/0k74oqres9w9a-f6b66d

Specify an explicit boundary style:

https://wolfram.com/xid/0k74oqres9w9a-2apatr

Use explicit RegionBoundaryStyle in ContourPlot3D:

https://wolfram.com/xid/0k74oqres9w9a-i4wl5w

Style the full region with a specific color:

https://wolfram.com/xid/0k74oqres9w9a-1cooqx

Wolfram Research (2020), RegionBoundaryStyle, Wolfram Language function, https://reference.wolfram.com/language/ref/RegionBoundaryStyle.html.
Text
Wolfram Research (2020), RegionBoundaryStyle, Wolfram Language function, https://reference.wolfram.com/language/ref/RegionBoundaryStyle.html.
Wolfram Research (2020), RegionBoundaryStyle, Wolfram Language function, https://reference.wolfram.com/language/ref/RegionBoundaryStyle.html.
CMS
Wolfram Language. 2020. "RegionBoundaryStyle." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/RegionBoundaryStyle.html.
Wolfram Language. 2020. "RegionBoundaryStyle." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/RegionBoundaryStyle.html.
APA
Wolfram Language. (2020). RegionBoundaryStyle. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/RegionBoundaryStyle.html
Wolfram Language. (2020). RegionBoundaryStyle. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/RegionBoundaryStyle.html
BibTeX
@misc{reference.wolfram_2025_regionboundarystyle, author="Wolfram Research", title="{RegionBoundaryStyle}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/RegionBoundaryStyle.html}", note=[Accessed: 07-May-2025
]}
BibLaTeX
@online{reference.wolfram_2025_regionboundarystyle, organization={Wolfram Research}, title={RegionBoundaryStyle}, year={2020}, url={https://reference.wolfram.com/language/ref/RegionBoundaryStyle.html}, note=[Accessed: 07-May-2025
]}