Create bridging.md

content/en/docs/Concepts/bridging.md

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+---
+title: "Bridging Registrations"
+tag: [Template,Registration,Alignment,nat,navis,flybrains,Transforms]
+description: >
+  Transformations to map between different cononical Drosophila templates.
+---
+
+Many transforms to map between different Drosophila template brains are available.
+
+<p align="center">
+<img src="https://github.com/schlegelp/navis-flybrains/blob/main/_static/bridging_graph.png?raw=true" width="800">
+</p>
+
+You can see how to use the above in python using [navis-flybrains](https://navis.readthedocs.io/en/latest/source/tutorials/transforming.html) or in R using [nat.flybrains](https://natverse.org/nat.flybrains/index.html)