I can not figure this one out.
How do I remove this menu?
The above answer will hide it on that whole site. If you just want to hide the left nav bar on the single list page do the following:
1: Click settings and "Edit Page"
2: Add new web part to the page
3: Choose the script editor web part:
4: Insert the following into the script editor
<script>
<style>
#sideNavBox { DISPLAY: none }
</style>
</script>
Edit Page
option on default list page. Also, OP is using modern experience where you cannot add script editor web part.
Commented
May 26, 2021 at 15:10
Couple of things you can try:
Disable Quick Launch:
Remove all navigation links:
Output:
Note: It will hide left navigation from all places & not just lists.
If you want to hide the left navigation temporarily when you are viewing list items/data, you can use the Expand content option at the top:
It will hide SharePoint app bar, left navigation, site title & logo temporarily until you again Collapse content using the same option.
Update from comments:
The quick launch (left navigation) is hidden on lists as well for me: