# Drivers / Modulators

Each parameter of a block can be adjusted by hand. But what if you want to automate them?

Say hello to Drivers, basically Block Stacks that can be attached to a parameter creating a behavior that controls its value.

## Controls

There's a few controls that's good to know about

| Action             | How                                                            |
| ------------------ | -------------------------------------------------------------- |
| Attach a driver    | Click on the small empty rounded rectangle next to a parameter |
| Detach a driver    | Alt+click on a filled rounded rectangle next to a parameter    |
| Exit driver        | Esc                                                            |
| Adjust value range | Slide the diamond shaped nubs on a drive parameter             |