[libreoffice-l10n] meaning of "scaled depth"?

In UI svx/uiconfig/ui.po
scaled depth (P9rCf)
depth (BgFnq)

This is not part of LO that I use. Can someone please briefly explain
what this is about for translation purposes? I presume we are not
scaling the depths of despair or suchlike. Is it to do with the grid
spacing of a graph, or the amount by which something has been reduced in
size, or something else?

Donaldo

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