You can use the Settings window to customize the columns that appear on your lists. You can add and remove fields, as well as rearrange their order. The settings you make here are saved on a per user, per company basis, so another user can have different settings for the same list.
Below is a description of the fields.
Note: You are limited with each list type to the fields that appear in these two boxes. You cannot add fields that do not appear in either box. See a list of fields that are available for the main lists.
Tip: You can select multiple fields at one time by using the Shift key (for contiguous items) or Control key (for non-contiguous items) and clicking. You can also double-click an item to move it from one box to the other.
Note: Fields with an asterisk next to them are calculated fields. Adding many of them to a list may slow down the performance of the list.