How to call root level two components file method to another one

hi, i have two components file like custom-select and text-select. i used custom-select(drop down) option in text-select hbs file. my problem is when i select some text will showed text popup with drop down option. new case working fine. is existing case. will select and show exist value on drop down. how to call that component(custom-select file) method to another component (text-select file).?

Hello and welcome. If you can try to rephrase your question it may help get better answers.

If you are asking how one component can invoke a method on another component, see Exposing Actions as Public API.