Decimal point, contrast, insert
Three more settings. 
, 
, 
, 
chooses a decimal comma for answers. , , 
adjusts the contrast, with + and −. , , 
, switches the Line editor from insert to overwrite.
Three more settings. , , , chooses a decimal comma for answers. , , adjusts the contrast, with + and −. , , , switches the Line editor from insert to overwrite.