Google Calendar - How to Accept/Decline an Invitation to an Event
(Here is a video on How to Accept/Decline an Invitation to an Event.) Included are how to do this both in Google Calendar, and from within your email.
To accept/decline an invitation to an event while in Google Calendar:
Find the event on your calendar, it will have white shading in the week/day view -
When you click on the event, you will have the option to respond at the bottom of the event. You can just click on your selection -
If you select Yes, it will shade the same as other events on your calendar.
If you click No, it will keep the white shading and strike-through the text (though you can change this handling of No's in your settings) -
If you click Maybe, the event gets lined shading through either the circle or the event depending on your view -
If you want, you are able to respond to the event right within email. There are 2 ways to do this.
You can use the RSVP option that appears next to the email in your list when mousing over it -