# Form operators

Form operators can be divided into several categories:

* [Value input](/Value_input.md) - operators responsible for inputting a value.
* [Object group operators](/Object_group_operators.md) - operators that operate on an [object group](/Form_structure.md#objects) of a form.
* [Focus operators](/Focus_operators.md) - operators that manage the activity of form elements and report on it.
* [Capture](/Capture_SCREENSHOT.md) - an operator that creates an action capturing the currently rendered visual state of the user interface.
* [Container visibility](/Container_visibility_EXPAND_COLLAPSE.md) - operators that create actions controlling the visibility of the contents of collapsible containers of a form.