Open your email signature in Google Chrome or Mozilla Firefox.
If you're logged into your Email Signature Rescue account then you can view your email signature in Full Screen Preview.
IMPORTANT: Use only the Google Chrome or Mozilla Firefox web browser. Do not use the Safari web browser to copy your email signature from as there is a bug in Safari that will cause your images to stack vertically.
Now that your email signature is open in a new window, press Cmd + A to highlight the signature, then press Cmd + C to copy the signature.
NOTE: Do not use your mouse to highlight your signature, use the key command. Using your mouse may result in you missing out on some code which will cause issues with formatting.
Switch to Spark Mail and from the toolbar select Spark > Preferences.
From the Preferences window you will see tabs listed across the top, select Signatures.
On the left hand side you will find your signature list. Click the + icon at the bottom to add a new signature. Click inside the signature window and press Cmd + V to paste your copied email signature.
Now that your signature has been pasted, click the Default for button and select your email account.
Click Save, close out of your preferences and compose a new email. Your signature will now be automatically inserted into your emails.