Positioning Text Bottom Left

good morning,

 

i'm wondering how can accurately position text centrally in bottom left corner of document. explain further, imagine document split 4 quarters, , in bottom left quarter, want text position centrally within quarter.

 

of course doable eye, understandably, want photoshop work, telling me text numerically positioned correctly , equally within document.

 

martin

one can align layers selection , starting select > 1 can transform selection 50% appropriate reference point location (in options bar). 

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