Batch Add Events page scroll button gets pushed down and to the left at low resolution or zoom settings.
The button to scroll forward can sometimes be forced onto the next line, around the subheading for step 3 on the page.
We've found that what happens at certain screen resolutions and/or browser zooms is that the orange circle button with the right-pointing arrow wanders down to the next line, somewhere around the heading for step 3 on that page.
If you have the focus on your browser, you can zoom it out by tapping the minus key (-) while holding down the Ctrl key on a Windows machine or the Command key on a Mac, and that will put the button back where it's supposed to be. Or, you can just use it where it wandered to, once you know where to look.