To view your boards, sign in to InVision, and then click the Boards tab.
To view a board, tap it. While you cannot comment on a board as a whole, you can comment on board items. Once you open a board item, tap Leave a comment at the bottom of the screen to start typing your comment, then tap Post. When commenting on board items, you can use @mentions to notify others about your comments.
Note: Currently you can only view and comment from the iOS app. If you need to share, edit, add, or rearrange content, just sign in to your InVision account from a desktop web browser.