API Region SetScale

Specified a size scaling to be applied to the (and its children). region:SetScale(newScale)

Arguments

 * newScale : Number - New scale applied to this region and its children; must be greater than 0, 1 indicates no additional scaling.

Example
The MinimapCluster and all of its child frames will become scaled 1.2 times from their parent. MinimapCluster:SetScale(1.2);

Details
Since the API presentation is scaled, each object has its own internal notion of size, which is only relative to the actual size it appears on-screen. will have a reasonable scaling factor selected by the game engine, from which all of the child UI elements are then derived. This function can be used to selectively change the scale of a component relative to its parent such that it appears to become bigger or smaller. UI elements with appropriately specified anchor points and sizes should scale quite cleanly.

Also see LibWindow-1.1's approach to saving positions of "window"-style frames: