- Some changes to section based ring and ViaStacks [PR](https://github.com/gdsfactory/gdsfactory/pull/1475)
- add dataprep [PR](https://github.com/gdsfactory/gdsfactory/pull/1470)
- `centre` can now also be specified when `port` is used when using add_port. [PR](https://github.com/gdsfactory/gdsfactory/pull/1478)
- Add corner rounding to dataprep notebook [PR](https://github.com/gdsfactory/gdsfactory/pull/1477)