Replace pics in Grids not available?

No option to replace pictures once you set up the grid. I've looked at the video guide provided in Support and 'Andy' is clicking an option under the image that doesn't appear on my account. I've put highlights into the attached screenshots to show what I mean. https://www.loom.com/share/c7eb2a7bf6394b04b4cda2c5b3279ceb?sid=1e1576df-dbd8-4ef0-b195-ffba15facb22