# Comparing roles and capability usage - Roleline 1.x documentation

> Two roles side by side, and which roles and users have a capability.

> [!NOTE]
> This is part of **Roleline Pro**.

## Compare two roles

**Users → Roles → Compare** puts two roles side by side.

![Compare](https://storage.extendiment.com/media/634/screenshot-8-e8ecf813.png)

1. Choose the two roles.
2. Leave **Only differences** ticked to see only what one has and the other doesn't, or untick it for everything either has.
3. Click **Compare**.

The summary says how many capabilities only the first has, only the second has, and both have. Click a role's name to open it in the role editor.

Handy before merging two roles, or to check what a custom role is missing compared with WordPress's.

## Capability usage

**Users → Roles → Capability usage** answers "who can do this?".

![Capability usage](https://storage.extendiment.com/media/635/screenshot-9.png)

Type a capability (suggestions appear as you type) and click **Show who has it**:

- the roles that grant it, and those that explicitly deny it;
- how many users have it through a role (each counted once, even with several roles);
- users who were given it directly, not through a role.

Below, **All capabilities** lists every capability by group with the roles that grant it.

## REST API

- `GET /wp-json/roleline/v1/compare?a=editor&b=author`
- `GET /wp-json/roleline/v1/capabilities/<capability>/usage`

Source: https://extendiment.com/plugins/roleline/docs/1.x/comparing-roles