levani

And how can I do it?

This is in help documentation:

2.Inserting a form

In posts and pages:

Please use <!--cforms--> for the first form and/or <!--cformsX--> for your other forms to include them in your Pages/Posts. You can apply the aforementioned code either manually or via the editor button (if turned in the Plugin Settings).

Via PHP function call:

Alternatively, you can specifically insert a form (into the sidebar for instance etc.) per the PHP function call insert_cform(); for the default/first form and/or insert_cform('X'); for any other form.

Note: "X" represents the number of the form, starting with 2, 3,4 ..and so forth.