Navigate to the desired table (for example the Product Table or Customer Table) and click the Edit Table button:
To delete a column, click on the three-line ("hamburger") menu button next to any column. Select the Modify tab, and click Delete Column. Select the column you wish to delete, and click Accept.
To insert a column, click the hamburger menu button next to any column. Select the Modify tab, and click Insert Left or Insert Right. You can then select whether you wish to insert a column to the left or right of any column in your table. Click Accept to finish the column insertion.
To move a column, click the hamburger menu button next to any column. Select the Modify tab, and click "Move [column name]." You can then select where you wish to move the column. Click Accept to finalize the column move.
To retag a column, click the hamburger menu button next to any column. Select the Modify tab, and click Change Column Rules. You can then select the new column tag, and click Accept to finalize your change.
To pin a column in place so you can see it while you are working on other columns, click the hamburger menu button next to any column. Select the Focus tab, and select whether you want this column pinned to the right or left. You can unpin it when you're done.