It's simple. Open Captio and start typing. When you're done, hit Send. The note is immediately delivered to your email inbox.
“If you're looking for something to capture everything you need to remember (and capture it quickly), I highly recommend picking up Captio” — The Unofficial Apple Weblog
“If you need to send photos or screenshots to yourself on a regular basis then Captio will save you quite a bit of time” — Lifehacker.com
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"Swish" sound by Pogotron