Down here are some handy utility features that make life easier.
Undo/Redo
Undo reverts your actions, one step per click. Redo undoes your undos. You could make a cool sample of yourself saying that.
Help tips section
If you need a reminder of what a control does, just place your mouse over it, and a short help tip will be visible here.
Snapshots
This is a great way to compare various settings. If you have a setting you think you like and want to be able to retrieve it, just take a Snapshot by clicking the + button next to the A. This saves all current settings to a new Snapshot slot. You now have two buttons marked A, but as soon as you make a change to it, it will turn into snapshot B. Now you can tweak to your heart’s content and still find your way back to A with a single click. You can save up to four different Snapshots.
These are great for that intermediate state when you want to try out and compare a number of settings but don’t want to commit to saving presets for each.
Bypass
Turns off DB-30, allowing you to hear your original audio without any processing.