> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to overload custom blocks

## Question:

How to overload custom blocks

## Applies to:

* Custom Blocks

## Answer:

<Note>
  This article uses a Custom Block to create our desired outcome. If you are new to using Custom Blocks, learn how to import, modify, and update them with the following resources:

  * **Learning Center course:**
    * [Intro to Automation](https://learn.ntopology.com/intro-to-automation)
  * **Articles:**
    * [How to update a Custom Block in an active notebook](/help-articles/knowledge-base/user-interface/how-to-update-a-custom-block-in-an-active-notebook)
    * [How to open up a Custom Block](https://support.ntop.com/hc/en-us/articles/4402068300435)
</Note>

1. Create the custom block by following the article or the learning center course.

![The block structure for creating the Center of Gravity custom block. The body to have its center of gravity evaluated is a lattice type.](https://files.learn.ntop.com/help-articles/user-interface/21486881283603.png)

![The Center of Gravity custom block.](https://files.learn.ntop.com/help-articles/user-interface/21486932630291.png)

2. Copy and paste the nTop file to modify the custom block to be overloaded.

![The file explorer view of the center of gravity custom block. The file is copy and pasted to create a duplicate.](https://files.learn.ntop.com/help-articles/user-interface/21486959769747.png)

3. Open the Copy custom block, make changes, and save it.

![The block structure of the copy of the center of gravity custom block. The body input type has been changed from a lattice to an implicit body.](https://files.learn.ntop.com/help-articles/user-interface/21487148027539.png)

4. Import both custom blocks.

![Importing both versions of the center of gravity custom block into an nTop notebook.](https://files.learn.ntop.com/help-articles/user-interface/21487119016467.png)

## The Center of Gravity custom block with the overload menu expanded. There are two options depending on using an implicit body input or a lattice input.

## Keywords:

*block custom overloading*