In Google Apps Mail, all related messages are combined into conversation or thread. There are instances when you just want to print a certain message within that conversation.
Here are the steps:
1. Locate the conversation that has the message you want to print.
2. Click to open the conversation. Locate the message you want to print.
3. Click the message. This will expand the message. Click the down arrow next to Reply, at the top-right of the message.
4. Select Print