, ▁h ich ▁can ▁lead ▁to ▁repet itive ▁stra in ▁injury . ▁ ▁Using ▁standard ▁PC ▁keyboard ▁ ▁Mir ror ed ▁keyboard ▁The ▁idea ▁is ▁to ▁only ▁use ▁one ▁hand ▁( pre fer ably ▁the ▁left ▁one ) ▁and ▁type ▁the ▁right - hand ▁letters ▁by ▁holding ▁a ▁key ▁which ▁acts ▁as ▁a ▁mod ifier ▁key . ▁The ▁layout ▁is ▁mirror ed , ▁so ▁the ▁use ▁of ▁the ▁mus cle ▁memory ▁of ▁the ▁other ▁hand ▁is ▁possible , ▁which ▁greatly ▁reduces ▁the ▁amount ▁of ▁time ▁needed ▁to ▁learn ▁the ▁layout , ▁if ▁the ▁person ▁previously ▁used ▁both ▁hands ▁to ▁type . ▁This ▁was ▁first ▁proposed ▁by ▁Rand all ▁Mun roe ▁on ▁the ▁x k cd - blog . ▁ ▁Hand ▁home position ▁on ▁F G H J ▁Using ▁a ▁standard ▁keyboard , ▁the ▁one - hand ed ▁typ ist ▁must ▁move ▁from ▁side ▁to ▁side ▁to ▁cover ▁all ▁the ▁keys . ▁Ide ally , ▁this ▁typ ist ▁should ▁keep ▁their ▁main ▁hand ▁on ▁F G H J , ▁but ▁they ▁will ▁in ev it ably ▁be ▁forced ▁to ▁leave ▁the ▁home ▁keys ▁or ▁stretch ▁like ▁a ▁concert ▁pian ist ▁to ▁reach ▁all ▁the ▁letters . ▁Without ▁using ▁a ▁second ▁hand ▁as ▁an ▁aid ▁( for ▁example , ▁the ▁right ▁shift ▁key ), ▁most ▁capital ▁letters ▁require ▁a ▁time - consum ing ▁exc urs ion ▁to ▁one ▁side ▁or ▁the ▁other . ▁This ▁reduces ▁efficiency ▁and ▁fr ustr ates ▁the ▁typ ist . ▁ ▁Special ▁keyboard ▁layout ▁Some ▁single - hand ▁keyboard ▁layout s