Click "Menu settings" dropdown in the right hand toolbar. 

It will not allow Save unless we add a title to the "Title" field as well, which we will do below. 

Now that we have created our Post page, we will add a column layout. Click "Edit".

Like editing using contextual links, Gutenberg also uses contextual links to add layouts. use your mouse to find the "+" button in the block area. 

Choose 50/50 if you want an even side by side layout. 

Click the "+" button on the left to add content to the left column. 

Click "Media Library" to browse and upload using Media Library. 

Click the "+" button on the right to add content to the right column.

Click "Paragraph" to add text using the CK Editor. 

Now that we have added our text, use the tabs on the right hand tool bar to switch back to "Post".

Click the "Revision log message" field to write the update made to the page. You cannot save the page until a revision message is added. 

Now we can see our two columns of image and text on our page. 

Pantheonsite

dev-demo-docs.pantheonsite.io

"Post" is a content type that uses Gutenberg. This is a special content type that allows you to click and drag content in order to design and layout your page. 

Exercise 1: Creating a "Post" Page and Adding a Column Layout