Access your Notification Settings from Account Settings.
You will find this option at the top right next to your name.
Next, click Notification Settings.
Starting with Email Settings, you can change the frequency of emails to Immediately, once per 15 minutes, once per 30 minutes, once per hour and once per day. Be sure to choose your timezone.
Slack is a messaging app for teams. It's a 3rd party application that allows you to post all notifications from multiple projects into a single Slack channel. If you want to change the Slack channel, you can turn it off here and then turn it back on to sync with a new Slack channel.
Under Project Notifications, you can choose to opt out of all notifications from individual projects. For the projects you have unchecked, you will not receive in-app notifications nor email notifications.
Setting Your Email Preferences Per Project
While you are in a project, click on the gear icon at the top right and then you will see your email notification preferences for this project. You can choose to receive email notifications on Comments, Added Media and when a collaborator or team member joins the project.
If you are a Team Member or you are the owner of the project, you will also see Everyone Else's Email Notifications to set the default. Each Collaborator will have the ability to turn on notifications for themselves under this settings page.