Select & Multiple Select Column
The Select column type is ideal for selecting an option from a list of options. To add a Select column, click the '+' icon on the right. Then choose 'Select' and you can start adding items. You can optionally add color to each item.
After you add the items, you can remove them by clicking the 'X' button and you can also reorder items by clicking the handle on the left side of each item.
The multiple select column type is similar to the select column type. However, it allows you to select multiple options which will be displayed in the cell..
After you create a Select or Multiple Select columns, you can dynamically add or remove items by using the column settings menu. It will bring up the same dialog you used for the initial set up of the select or multiple select columns.