Hi here,

When I double-click on a TeX document to open it, Emacs will show the
scratch window instead of the TeX document window, as shown in the
attachment. Any tips will be appreciated.

Regards,
Zhao
-- 
Assoc. Prof. Hongsheng Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
No. 473, Quannan West Street, Xindu District, Xingtai, Hebei province