I have found the best and easier way to create buttons for approval and rejection email. For those who does not like default "Approve RITM" links. Here is the way.
1. Go to sysevent_email_action.LIST
2. Copy the out of box approval email notification
3. Under "What it will contain"
4. Message HTML
5. CLICK "<>" icon
6. In the source code paste the following
7.<div style="font-family: lato,arial,sans; line-height: 24px; background-color: #28a745; color: #ffffff; padding: 10px 18px; text-decoration: none; border-radius: 4px; font-size: 12pt; display: inline-block;">${mailto:mailto.approval}</div>
<div style="font-family: lato,arial,sans; line-height: 24px; background-color: #dc3545; color: #ffffff; padding: 10px 18px; text-decoration: none; border-radius: 4px; font-size: 12pt; display: inline-block;">${mailto:mailto.rejection}</div>
8.Enjoy!
