Multiple content areas in a page?

I'm testing out Grav and am loving it so far. I'm thinking of using it for a future project that will need a page/blog entry template with more than one content area in it (main content and a sidebar with notes). Is there a way to do this with Grav?

I remember Liquid having a {% capture %} tag that may be used for this, but Twig and Grav are still new to me and I haven't dug around much. Help please?

Yup, this is exactly the use case that Section shortcode was designed for:

https://github.com/getgrav/grav-plugin-shortcode-core#section

Thank you so much for the link! Now I think I love Grav a little bit more.