For your defaul league create a flex position and drop the number of Wr's to 2 from 3.
Yahoo really needs to drop the 3rd WR position and make it a flex. Players would be free to utilize a WR, RB or TE for this role. This would bring the Yahoo experience close to the ESPN format which has been so popular over the years.
Jorge Sanchez commented
Collectively our league wants to switch from 3 WR to 2 WR and 1 Flex. We were un aware that was not allowed to switch after the draft. is there a way to over ride this please??
Jon Reaves commented
Add combo position of rb/wr/te in place of one of the wr places.