When a central bank buys bonds or lends against them, the asset lands on one side and the newly created money on the other, so the sheet grows. Shrinking it pulls money back out, which is why the direction of a central bank's balance sheet is read as a policy stance in its own right, separate from the level of interest rates.
Awaiting gradingOn July 31 the New York Fed sold euros to buy yenScore on the Fed's H.4.1 released August 6 (as of August 5): dollars borrowed by foreign monetary authorities against Treasuries moving off zero counts as the FIMA route opening, staying at zero counts as the original expectation missing.