Does anyone know if it is possible to create a custom symbology patch to be applied to a map legend in ArcGIS Pro?
I know this was possible in ArcGIS Desktop within the legend properties dialog, Items tab, style properties window.
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It appears that this feature is not currently available as far as I can find. How to Change Legend Patch Shape? However, there is a workaround.
At least from the ESRI Help, it appears that unfortunately this is not an option. It looks like one can only do sizing of the current patch, not change its shape.
From the Help: On the Design tab, you can set the default legend patch size. In the Settings group, you can select or input a size for Patch Width and Patch Height.
It appears only the size of the patch at the moment can be modified, Update legend patch size
You can set the default legend patch size by right-clicking the legend item in the Contents pane and choosing Properties. In the Format Legend pane, you can change the size for Patch Width and Patch Height
Also, it appears a potential work-around of importing a different patch shape from an existing mxd set up in ArcGIS Desktop is also out: Because the functionality of legends in ArcGIS Pro does not match the functionality available in ArcMap, legends will be converted to use settings available in ArcGIS Pro.
Legends are imported with ArcMap documents. When you import an ArcMap document, maps and layouts are created separately in your project. If the layout in your ArcMap document contains a legend, it will be imported with the layout and adjusted to use the properties and settings available in ArcGIS Pro.
I have used this Q&A to post an ArcGIS Idea that ArcGIS Pro needs legend patch shape options like ArcMap:
As noted at Creating Custom Symbology Patchs for ArcGIS Pro Map Legends? ArcGIS Pro, at least up until version 2.1.3, does not have the option to change the patch shapes of legend items like ArcMap does.
This page from the ArcGIS Desktop help describes the functionality that those familiar with ArcMap may be looking for in ArcGIS Pro: http://desktop.arcgis.com/en/arcmap/latest/map/page-layouts/working-with-legend-patch-shapes.htm
I recommend adding your vote to that ArcGIS Idea.