Appreciate your help... Question is related to the stock Android email app on Samsung Galaxy S4 Active.... when opening an email with an attachment, there is a tab to view Message or Attachment. Tap Attachment, and there are 2 buttons: Preview, and Save. Tap Preview and USUALLY a choice of apps is offered. Unfortunately I must have tapped Always when choosing one app. Now it is the default, and no choice offered. How do I clear this particular default, so I get a choice again when previewing email attachments? Thx, Peter