Modular schematic diagram of AD software

First we create two schematic files

Then we place a page break in Sheet2.SchDoc and double-click the green box

Select target file

We select the Sheet4.SchDoc we just created

Then   click on Interactive Navigation in the  View-> Panel-> Navigator option

You can see that Sheet4.SchDoc is added under Sheet2.SchDoc

Through the above method, we can draw a circuit diagram separately, and then provide external pins to achieve modular or hierarchical design of the circuit diagram