Supports the following standard Ace3 structures:

• Color
• Execute
• Groups
• Header
• Input
• Range
• Select
• Toggle

local menuframe = LibStub("LibDropdown-1.0"):OpenAce3Menu(Ace3ConfigTable)

This returns a frame for the root menu. You might want to use SetPoint on this frame to attach it to an appropriate location. You may optionally release the menu with:

menuframe:Release()

However this isn't required as the addon will do this when the menu is hidden.