Hi @filsafalasafifvff, welcome to Thunkable! 
Be sure to check out our posts about How to ask Great Questions v2.0 and our Community Guidelines as you get started.
What you are looking for is called the Layout component in Thunkable. Thunkable’s layout component allows for more precise positioning of UI components on an app screen, by allowing you to position UI components dependent on other UI components on the screen. Here is the link to the Docs for how to use the Layout component.
https://docs.thunkable.com/app-design/ui-components/basic-components/layout
Let us know how it goes! 