When creating a grade category, here are some extra settings that you might find helpful.
To create a basic grade category, follow the instruction in Creating a basic grade category.
General Properties
Some options to provide context to your Grade Categories.

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Short Name (A)
Enter a short name for long Grade Category names that only you will see in Enter Grades. &²Ô²ú²õ±è;
Grade Categories have ample room in the Manage Grades table, so short names are rarely required.
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Provide a description about the category for yourself and choose whether or not to share it with your learners.
Display Option Properties
Some options to display Grade Category information. &²Ô²ú²õ±è;

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Display class average to users (A)
Select this option to allow learners to see the class average for a specific Grade Category.
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Display grade distribution to users (B)
Select this option to allow learners to see a graph showing how grades were distributed between different percentiles for a specific Grade Category.
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Override display options for this item (C)
Default score views you show to learners is set in your Settings. You can choose to display a numeric score, the weighted grade, and Grade Scheme elements. To learn more, please visit the  &²Ô²ú²õ±è;
Restrictions
Some options to restrict what your learners have access to in Grades. &²Ô²ú²õ±è;

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Hide from Users (A)
Choose to make the category visible or hidden from users.
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Set availability to hide the category from learners, and use a start and end date to control when they have access.
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Display in Calendar (C) &²Ô²ú²õ±è;
Choose to make the category display in the course calendar when it's available to learners. &²Ô²ú²õ±è;
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Release Conditions (D)
Set Release Conditions to define how, and when, a category will display to your learners.