HTC One User Manual page 201

To view email messages from all your accounts, tap the bar
§
that shows the current email account, and then tap All
accounts.
To change an email account's settings, select the account and
§
then tap
Organizing your inbox
Do you have a big pile of email messages in your inbox? Organize your
email messages into tabs and quickly find the messages you want.
1. Switch to the email account that you want to use.
2. In the inbox, tap
3. Select the tabs you want to add to the inbox, and then tap Done.
> Settings.
> Filters.
Email 201