Click the 
Zoom button on the Table ribbon tab. The drop-down menu opens:
To change table display zoom in express reports and dashboards, execute one of the operations:
Click the Zoom button on the Table ribbon tab. The drop-down menu opens:
Execute one of the operations:
Select the radio button next to one of the predefined zoom values.
Select the Custom item. The Zoom dialog box opens to specify the custom zoom value:
Focus on the table 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.
See also:
Formatting Table and Its Elements