People using Google Sheets will now be able to add images to frozen sections. This is helpful for prettying up invoices, reports and other spreadsheets where you want to feature a logo or image:
images_frozen.png

To insert an image in a frozen section, select a cell in the row and click on Insert > Image. You can then resize and move your image to fit the section or rows as needed.

Release track:
Rapid release, with Scheduled release coming in two weeks

For more information:
Help Center