Hi.,

You can enable the page builder option from from Dashboard > Appearance > Trend Salon Options > Page Builder > here enable the page builder for pages, post, etc., the you can use the page builder sample layouts to create the sample pages with page builder modules and you can customize those modules with page builders.

So you can use either Page builder / Visual Composer modules to create the new page contents. You can’t use Page builder / Visual Composer in one page.