Above, centered

Above the source panel, aligned to the left.

Above the source panel, aligned to the right.

Below the source panel, centered horizontally.

Below the source panel, aligned to the left.

Below the source panel, aligned to the right.

Below the source panel, stretch to the width of the Sandbox.UI.Popup.PopupSource.

To the left of the source panel, centered.

To the left of the source panel, aligned to the bottom.

To the right of the source panel, centered.

To the right of the source panel, aligned to the bottom.

To the right of the source panel, aligned to the top. Where a submenu goes.

Position where the mouse cursor is currently