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Snap to grid

Windows shortcut 
Alt
Mac shortcut 

Use this shortcut to snap objects to the Excel grid, including  including charts, shapes, smart art, and text boxes. This works both for dragging objects to a new location on the worksheet, as well as resizing objects so that their edges align to the grid. This is a very handy way to ensure objects are exactly the same size without enabling the snap to grid setting in Excel.

Related videos

The videos below show how this shortcut can be used.
In this video, we'll look at how to plot average daylight hours per month in a chart, using sunrise and sunset data.
In this video, we'll look at how to build a simple dynamic chart in Excel. A dynamic chart automatically responds to changes in data.
In this video, we'll look at how to plot over 3000 survey responses to a question in an Excel bar chart.