It is just a simple tip nothing fancy.
On command prompt you just type SSMS and hit OK.
Your SQL server Management studio will be open.
You can get other option also by typing ssms/? .
You will get below options
Now if you want to login to particular SQL Server Instance you can choose option as mention in above screen.
For example to open SQL Express version on my machine, I wrote query as shown in below image
Enjoy!!!