How to combine UMAP plots from multiple datasets

Question

[shome]

I have 4 different sc-RNA seq datasets which are a result of different treatments.On clustering with Scanpy and UMAP,I am getting different clusters for each of the datasets which is not easy to interpret or compare.Hence,I am planning to combine the UMAP plots for each of the 4 cases into one or at least how to make sure that same type of clusters are made for each of the datasets so that I can compare the UMAPs amongst each other ?

[rpolicastro]

Follow the scanpy integration tutorial.