Anchors

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Anchors (or FRAMEPOINT in the XML schema) are an enumeration of the following values, used with Region:SetPoint() or <Anchor>.

• TOPLEFT
• TOPRIGHT
• BOTTOMLEFT
• BOTTOMRIGHT
• TOP
• BOTTOM
• LEFT
• RIGHT
• CENTER

Initialization

During the AddOn loading process, anchors are adjusted at multiple stages. ^{[citation needed]} 

VARIABLES_LOADED

Anchors defined in XML have already been set.

PLAYER_ENTERING_WORLD

If a frame is parented to UIParent, then its anchors are wiped and replaced with layout-cache.txt. If the frame layout data have not been saved in the cache (the user has never moved the frame with the mouse), Frame:GetLeft(), Frame:GetBottom(), Frame:GetRight() and Frame:GetTop() return nil.