If you are specifically asking about 'dotted with', it is not a common phrase. The only meaning I can think of is that 'dotted with x' means 'covered with x dots'. e.g. 'Dotted with yellow' means 'covered with yellow dots', e.g. "she was wearing a purple skirt dotted with daffodil yellow". It is occasionally used in cooking too, e.g. 'dotted with butter', meaning that you have put dots of butter on top of something, or perhaps 'dotted with nuts', meaning that some sort of rounded nuts had been placed on something.