You can show or hide columns in a report by clicking the “gear” icon near the Visualization button at the bottom of the page. It will open a panel to the left with the list of columns. Hide or show the columns using the “eye” icon. Click Done to close the panel.
Note: The dowloaded report will contain only visible columns.
You can also change the column position by dragging the column name sideways or dragging the corresponding element with the column name up or down in the Columns list in the right sidebar.