# Functions in Metrics Explorer

You can change the function that plots the metric, [add](https://docs.kloudfuse.com/platform/3.5.0/metrics-explorer-functions/#function-add) a new function, or [remove](https://docs.kloudfuse.com/platform/3.5.0/metrics-explorer-functions/#function-remove) functions entirely.

## Add function

1. To add a new function to the graph, click the  (Sigma) icon at the end of the query specification.

2. In the drop-down, either search for a function name, or select an existing function category, and then pick the function name.

See the list of [Metric functions](https://docs.kloudfuse.com/platform/3.5.0/metrics-functions/).

3. The interface displays the combination of the functions.

Here we have a combination of default `avg()` and default `diff()` functions.

4. Configure the parameters of the function, if any.

In this example, the new function `diff()` has a configurable parameter.

Click on the default measurement of 10 minutes, and select another value from the drop-down.

5. The interface displays the graph with the parameter on the `diff()` section set to 1m instead of default 10 m.

## Remove function

Sometimes, you may want to remove a function from a graph. For example, you may want to remove the default aggregation, as described in [Remove aggregation](https://docs.kloudfuse.com/platform/3.5.0/metrics-aggregation/#aggregation-remove).

At other times, you may want to remove a limiting function. In this example, we graph the metric `advanced_functions_server_data_fetch_latency_sum` with a `Clamp Max 100`, and a `Rate Per Minute 10m`. To drop the limiting `Clamp Max` function, follow these steps:

1. To remove a function, click  (Remove function) icon, next to the function you want to drop.

2. The interface displays the graph for the metric `advanced_functions_server_data_fetch_latency_sum` with only and a `Rate Per Minute 10m` function.