Application.ScreenUpdating Property (Excel)
True if screen updating is turned on. Read/write Boolean.
This example demonstrates how turning off screen updating can make your code run faster. The example hides every other column on Sheet1, while keeping track of the time it takes to do so. The first time the example hides the columns, screen updating is turned on; the second time, screen updating is turned off. When you run this example, you can compare the respective running times, which are displayed in the message box.
Dim elapsedTime(2) Application.ScreenUpdating = True For i = 1 To 2 If i = 2 Then Application.ScreenUpdating = False startTime = Time Worksheets("Sheet1").Activate For Each c In ActiveSheet.Columns If c.Column Mod 2 = 0 Then c.Hidden = True End If Next c stopTime = Time elapsedTime(i) = (stopTime - startTime) * 24 * 60 * 60 Next i Application.ScreenUpdating = True MsgBox "Elapsed time, screen updating on: " & elapsedTime(1) & _ " sec." & Chr(13) & _ "Elapsed time, screen updating off: " & elapsedTime(2) & _ " sec."