Set the value of binding variables

The community member has created a new variable mySelectValue to get the value of a webstudio select element, and wants to use it in another child of that. The comments suggest that the only way to set the value of a variable is to use a "Form" or "Link" to change search parameters, which can then be accessed using system.search.MY_PARAM. Another community member suggests placing the select element inside a form and submitting the form to the current page, which will update the search parameters and allow accessing the value from the select element. However, there is no direct way to change the value of a variable directly at the moment.