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

# Perform

> Run click, fill, and shortcut actions against UI elements

Use this tool to execute concrete UI interactions after you identify targets with Get Active App Context.

## Supported actions

* `click`: click a target element.
* `fill`: enter text into a text field or textarea.
* `shortcut`: send keyboard shortcuts (for example `cmd+c`, `ctrl+shift+t`).

## Inputs

* `elementID` (required for `click` and `fill`): element ID from Get Active App Context output.
* `text` (required for `fill`): value to insert in the target input.
* `shortcut` (required for `shortcut`): shortcut string.
* `windowID` (optional): target a specific window (`pid/title`) instead of the active one.

## Notes

* Element IDs expire with UI changes and session timing. Re-read context if an element is no longer valid.
* For background window targeting, use the same `windowID` across context read and perform steps.

## Good pairing

* [Get Active App Context](/apps-tools/computer-use-get-active-app-context)
* [Wait](/apps-tools/computer-use-wait)