How to update all columns?
How update a particular column?
How to stop updating?
How to stop updating a particular column?
To update all columns you can click " Refresh all" at the toolbar. 
To update a certain column you may "Update Column" menu item from the column popup menu.
To set up automatic columns updating please see"Column Alert and Update Properties"
If a column is being updating then the icon to the left of the column's title will be changed. 
This will be a help to know whether the icon is under updating.
To stop the process of updating all the columns click "Stop updating" at the toolbar. 
To stop the process of updating of a certain column click the right mouse button at the column which is under updating and choose "Stop updating" option from the popup menu.
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