S50 KEY shown in KiCad PCBnew tool and Gerbv Gerber File Viewer
FAIL: Net(KEY_MAT15 in PCBnew) shown is the KEYIN7 backbone in schematic, this is assumed to be the outer annular ring. In KiCad PCBnew window, KEY_MAT15 already shorts with GND layer by GND vil.
FAIL: Net(KEY_MAT1 in PCBnew) shown is the KEYOUT1 net in schematic.
FAIL: This is generated already shown as a single copper and drill layers in Gerbv Gerber Viewer, Be careful that there's a GND on the left side of outer annular pad. They are connected together. KiCad's DRC can't detect they are short together. Must by ourself judgement.
OK: This is a desirable pad by drawing a correct ring to segregate GND copper and outer annular pad (KEYIN7).