1. For that, hover over the page in the editor and click the "plus" icon:
2. Navigate to the Custom block tab in our gallery and choose custom-block:
Once you've added the custom block to your site, you need to fill it with elements. Elements are the basic building components of each block — for example, gallery, heading, accordion, list, etc.
1. Firstly, hover over the custom block, click on the "plus" sign and choose the needed element from the pop-up window:

1. Firstly, hover over a particular column and add a new one by clicking on the "plus" sign near it:
1. To access the settings of a column, hover over it and click on the "gear" in the top right corner:

1. To access the settings of a column, hover over it and click on the "gear" in the top right corner:
