layer defintion problem

I created a new layer of (DIMLAY) dimension in draft admin specialy from defaults file .But every time I changed the definitions of the layer for example (colour or font or CHEI) the draft takes the default definition of the program.How can I make a new layer with my definitions?

I created a new layer of (DIMLAY) dimension in draft admin specialy from defaults file .But every time I changed the definitions of the layer for example (colour or font or CHEI) the draft takes the default definition of the program.How can I make a new layer with my definitions?