It's our top priority that you'll be able to use QuickBooks easily, lenrphoto. Let me share some details for you to scroll down or view the details within your estimates page.
In QuickBooks Online (QBO), accessing the scroll bar or scrolling up and down within your transactions page can be seen on the right side of your screen. Since you mentioned that scrolling down is currently unavailable, I suggest using your private browser to rule out any possible cached files causing the problem. Here are the shortcut keys for accessing private browsers:
You can also zoom out by clicking the Ctrl + scroll down using the scroll wheel of your mouse so that you can see the entire page or utilize this material since it contains some information regarding what to do if there's no scroll bar to view: Unable to see the whole page in QuickBooks Online.