How do I set permissions to allow a person to manage the Grading Schemes?
From all indications, Eric Amtsberg, it's part of the "Manage Grades" permission. You will want to check this page: What user roles and permissions are available in Canvas? and then click on either of the first two links, which lead to PDF documents that go over which permission does what.
Hope this helps.
Grading schemes aren't mentioned in the documentation as far as permissions go.
Oh, but they are, unless I was misunderstanding your question. Check page 6 of the PDF that the page above links to, just under the Edit Grades section. (Again, the detailed information is not on that documentation page itself, but rather the PDFS that they link to) I probably just should have linked to the documents they referenced. Here's the direct link to the first PDF on Course roles:
In fact, here's a screen capture of what I was looking at:
It is also listed in the Account Roles permissions document, as well, also under the Edit Grades section. The Account Roles documentation is here:
The bigger issue is that often multiple permissions are wrapped up into one setting, which is a another topic of discussion!
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