This members-only tutorial provides the steps to use jQuery to change the value of a Fluent Forms form's checkbox that is inside an OxyExtras' OffCanvas component to checked when a button is clicked.
Step 1
Enable Fluent Form and OffCanvas components in OxyExtras' settings.
Edit your Template/Page with Oxygen and add a Section.
Add an OffCanvas component inside the Section and inside that, a Fluent Form component.
You may want to increase the Offcanvas width to something like 400px.
Select the form you wish to be shown in the off canvas.
Step 2
Add a Text Link/Button component that should trigger the off canvas.
Advanced → Attributes → Add Attribute
name: data-more-info value: Item 1
Change Item 1 to the value of your checkbox field's option that should be ticked when the button is clicked.
By default, the values of a Fluent Form's Checkbox Field are the same as their labels.
If you wish to change them, edit your form, tick "Show Values" and change them.