How to update my nrfconnnect sdk version to 2.1.99-dev1

[paper555]

Hi, My PC have already installed the nrf connect sdk with version v1.2.0. How can i update the nrf connect version to v1.2.99-dev1?  Please give me a few complete steps . 

[Kenneth]

Go to toolchain manager -> [v2.1.0] arrow down -> open bash

cd nrf
git pull
git checkout main
west update

Best regards,
Kenneth