Click the 
Zoom button, select the fixed value or insert the arbitrary value.
Focus on the sheet and scroll the mouse wheel while holding down the CTRL key. Scroll up the mouse wheel to zoom in and scroll down to zoom out.
To change zoom report sheet view, use the View group of the Home ribbon tab. It is available only in the desktop application.
To change zoom:
Click the Zoom button, select the fixed value or insert the arbitrary value.
Focus on the sheet and scroll the mouse wheel while holding down the CTRL key. Scroll up the mouse wheel to zoom in and scroll down to zoom out.
To display full-sized sheet, click the 
button.
See also: