There is a visual indicator in the Categories section that reflects the current selection of read-only, edit, or a combination of each. This indicator reports what the setting is without requiring you to open and examine the individual subcategory settings.

The indicator features a circular icon located to the right side of the Category listing that reports the following.

MDM_Roles Reporter full All options in this category have the edit capability (which by definition means that they also have read-only capability).
MDM_Roles Reporter three-quarters Most category settings have the edit capability enabled, but edits are disabled for at least one subcategory.
MDM_Roles Reporter half All category settings have read-only enabled (edit disabled).
MDM_Roles Reporter quarter Most category settings are read-only, but edits are enabled for at least one subcategory.