> 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](/files/-LzINnH5CL4vG-d45HnY)

![ROI displayed with green outline](/files/-LzIOH89gHt86KvJke-D)