# Step into

```
 Action    name: ThreadStepInto
 
```

This command executes one assembler instruction at a time, stepping into functions. See also

* [Step over](https://docs.hex-rays.com/9.0/user-guide/user-interface/menu-bar/debugger/process-control/step-over)
* [Run until return](https://docs.hex-rays.com/9.0/user-guide/user-interface/menu-bar/debugger/process-control/run-until-return)
* [Debugger submenu](https://docs.hex-rays.com/9.0/user-guide/user-interface/menu-bar/debugger).