clipping mask

You might also be interested to know you can set multiple layers as clipping masks so they all are contained within the one layer’s contents. You can also apply a clipping mask to folders. And you can do it with adjustment layers too.

In this example everything would be contained to area of “Layer 1”: 

​@Hosun 

I’m glad you found it soon after posting!

For other who come across this later, they are several ways to create a clipping mask. Here is the Help page from Adobe:

 https://helpx.adobe.com/photoshop/using/revealing-layers-clipping-masks.html

Jane