Look in the very middle of the first page.
Since page 1 & 2 of the new form 1040 are half-pages, the IRS is allowing the 1040 to be printed on the face of one full 8.5x11 page...so the signature ends up in the middle of the page.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*