These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] app-text/pdfio-1.6.5::gentoo  USE="png -verify-sig" 6643 KiB

Total: 1 package (1 new), Size of downloads: 6643 KiB