To edit this section, go to Online Store > Themes and click Customize.
Once inside the Customizer, you should see “Multicolumn” listed with all the other homepage sections. If it’s not there, add it by clicking on “Add Section.” After adding it, click on “Multicolumn” to open the settings.
To add a column, select “Add Column.” You have the option to add your own image or use one of the included icons. You can add as many blocks as you want or remove blocks by clicking on one and clicking Remove Block. You can change the size of the image by clicking on “Multicolumn” to see settings that pertain to the whole section.