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The ALT attribute is used to provide text labels which can be displayed in the status line as the mouse or other pointing device is moved over hotzones , or for constructing a textual menu for non-graphical user agents . Safety , health and environmental professionals , researchers and others are urged to submit original contributions related to the fields of safety , health and environment that can be displayed in an educational poster format . If an observation contains more variables than can be displayed in the FSEDIT window at one time , the information in each observation is divided into discrete units called screens . This list is a HTML resource that can be displayed by the browser . The temperature , barometric pressure , humidity , winds , and current conditions can be displayed in three different formats , updated hourly for North American Cities .