Open the Preferences dialog box.
Messages from Adobe
The General preferences include options for allowing Adobe to display in-product marketing messages while you work in the program. You decide whether to receive these in-product marketing messages.
Transactional messages, which facilitate the Adobe Online Service, cannot be turned off.
(Windows) Choose Edit > Preferences.
(Mac OS) Choose Adobe Reader > Preferences.
Under Categories, click General.
In the Messages From Adobe section, select options as desired.
Show Me Messages When I Launch Reader
Allows messages from Adobe to appear in the Welcome Screen when you launch the application without a document open. Click a message to get information about features, updates, or online services, or to open an element in the application, such as a task pane. Deselect the option to prevent in-product marketing messages from appearing.
Don’t Show Messages While Viewing A Document
Prevents in-product marketing messages from Adobe from appearing in the lower-left corner of the application window. Click the close button to dismiss the message. The message fades away if you do nothing. Leave the option deselected to allow in-product marketing messages.