I was able to replicate what you mentioned about needing to scroll down in the Gradebook to view the left-to-right scroll at the bottom of the screen. However, I was only able to replicate it if I resized my Gradebook window to be much shorter than the full height of my laptop screen. Because of that, I wonder if the available height of your laptop screen could be causing you to need to scroll down to view the left-to-right scroll? That's one possibility.
In your second paragraph, you mentioned wanting to minimize gradebook columns while also being able to view assignments' names. We have a very similar idea that is already open for conversation that I would recommend you adding your thoughts to: Keep Headings in Gradebook Visible with Narrower Columns.
Hi @BlairGreiner - Your idea has been edited to only feature the first request (the second is still referenced in Naomi's initial reply). It has been marked as Open!
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In the Instructure Community Ideas space, you can share, converse, and rate idea conversations related to software improvements to Instructure products.