Because the editor and the browser aren't tied together but are two separate windows, you can use the two modes independently of each other.
N'ihi na ndị nchịkọta akụkọ na ihe nchọgharị adịghị ejikọta ọnụ, ma ha nwere windo abụọ dị iche iche, ịnwere ike iji ụzọ abụọ ahụ na-enweghị onwe ha.