Can you check this option by double clicking on the chart?
If your answer is no, then try out these steps given below that help you to set your chart size.
- Make a double click on the chart you have selected.
- After that a “Format Chart Area” window will appear on the screen.
- From the left panel Select “Size” option. Then, on right pane a size window will open.
- Now, adjust the size of chart according to your needs by setting size and rotate, scale options.