macOS Screen Shot with you name on it.

sswn.sh

#!/bin/bash

/usr/sbin/screencapture -i /tmp/ss.png

SSF=$(date +"Screen Shot %Y-%m-%d at %r.png")
W="$(/Users/Nasy/.macports/bin/identify -format "%w" /tmp/ss.png)"
H="$(/Users/Nasy/.macports/bin/identify -format "%h" /tmp/ss.png)"
C="#A7FF83"

/Users/Nasy/.macports/bin/convert \
    /tmp/ss.png \
    \( -background none -fill $C -font "AppleChancery" -pointsize $((W/30)) -gravity center label:"Nasy" -trim +repage \) \
    \( -clone 1 -background black -shadow 80x25+0+0 \) \
    \( -clone 1 -clone 2 +swap -background none -layers merge +repage \) \
    -delete 1,2 \
    -gravity southeast -compose over -composite \
    \( -clone 0 -background $C -shadow 80x50+0+0 \) \
    -reverse -background none -layers merge +repage \
    "/Users/Nasy/Documents/Screenshots/$SSF"