> For the complete documentation index, see [llms.txt](https://docs.nedyx.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nedyx.com/version-1.66/nedyx/clearlines-functions/logical-functions/isuseraction.md). # ISUSERACTION #### Syntax **ISUSERACTION**() **Example** The ISUSERACTION returns true, if it is called * in the "On switch" formula of a menu, which has been switched by the user * in the "On click" formula of a button, which has been clicked by the user * in the "On input" formula of a cell or a table widget, in which the user has entered a new value The function can be used to ensure that a call of action will not lead to unnecessary calls of other actions. Like in this example: Button1 call "On click" action of button2 (with the CLICK function), and button2 does the same on button1. Without the proof by the ISUSERACTION function, this would lead to a recursion.