Within the columns component you can set one to six columns.
You can edit the number of columns by clicking on the up and down arrows, dragging the slider to the right or left or by typing the number directly in the field.
Stack on mobilecore/columns
Normally the column layout is maintained on tablet and mobile devices. When “Stack on mobile” is enabled each directly nested column will be forced to 50% on tablet devices and 100% on mobile devices.