Eric

I have an alternative trick here, it seems that the SpatialDimPlot still works on the Idents of the Seurat object. ```r Idents(ST.seu)

The code is as follows: ```R SV_data

Could I get any suggestions to help solve this problem? Thanks.

The Key function is exported from R package SeuratObject. So I think you should `library(Seurat)` before `RunAzimuth`. (At least it works for me)