Before Display Maid can work properly you will need to grant it the ability to control your computer.
To give Display Maid the access it needs open System Preferences and open the Security & Privacy pane.
Next click on the "Privacy Tab" and then select "Accessability" in the list on the left. If you have already opened Display Maid it may appear
in the list of apps on the right side of the window. If Display Maid does not appear in this area you can add it to the list either by dragging
and dropping the Display Maid icon from the Finder to the System Preferences window, or by pressing the '+' button and finding Display Maid.
Check the box next to Display Maid and you're done.
You may need to click on the lock in the bottom left hand corner and provide an administrator password before performing the last step.
Display Maid lives up in the menu bar, out of the way. Use the Display Maid menu to save your window positions, either globally, or in the front most app, and then restore them again when things get messy.
Enabling this option will allow Display Maid to detect when an external display is added or removed and then automatically restore the window layout for the current display configuration if one exists.
Open at Log In:
Enabling this option will make sure Display Maid is launched every time you turn your computer on.