Run ZC in -res640 480 big -fullscreen (easier with the launcher tool). All dialog boxes are centered except the L3 Cheat "Link Data." It's been there a long time...
ZC -res640 480 big -Fullscreen: Link Data (L3 Cheat) not centered. [693 and below]
Fixed.
Either fullscreen or windowed at 640x480, Link Data is centered!
Confirmed fixed in 697!