> For the complete documentation index, see [llms.txt](https://janelia-flyem.gitbook.io/neutu/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://janelia-flyem.gitbook.io/neutu/roi.md).

# ROI

It is often helpful to see certain regions of interests (ROIs) during proofreading. A ROI can be a biologically defined compartment or just a user-defined region for proofreading focus. ROIs are stored in DVID as a native ROI data type called `roi`. We can add a ROI name into the database settings to display it in the 2D view.

![Specify a ROI for display](https://2926737796-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Ld57Fj27nUB-NnjPb7c%2F-LzIMQC97fpVbl5CYAqa%2F-LzINnH5CL4vG-d45HnY%2Fimage.png?alt=media\&token=a0f31b2d-a51e-459c-ac96-17606cf724b8)

![ROI displayed with green outline](https://2926737796-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Ld57Fj27nUB-NnjPb7c%2F-LzIMQC97fpVbl5CYAqa%2F-LzIOH89gHt86KvJke-D%2Fimage.png?alt=media\&token=81feb2bd-02fe-4378-a48e-0de9f592df71)