Hi @Jodi, apologies for the delay in getting back to you.
I think I understand what you’re after now: when you have a row selected in the spreadsheet, you’d like to hide the inspector without having to click into a different row.
On Windows, the easiest way to do this is by pressing Ctrl + Alt + i. This will temporarily hide the inspector until you select a different row.
We’re unlikely to bring back the “i” button, since the inspector now automatically appears or hides depending on whether an event or item is selected. That said, we’ll look into whether there’s a way we could make it easier to quickly deselect items, especially in the spreadsheet where there isn’t space to click to clear the selection but keep working in the same row.