Improve the keyboard shortcut instructions for selecting nonadjacent items in the file list [e.g., under https://app.box.com/folder/]. From these instructions: https://community.box.com/t5/Migrating-and-Previewing-Content/Using-Keyboard-Shortcuts-for-Box/ta-p/25945
it is not clear and nonobvious that one has to navigate with the up and down arrows to land on the next file that you want to select, then you can press shift-x (which is a command that I've NEVER seen in a user interface).
Please improve your keyboard shortcuts article to be more explicit.