The link number indicates which linked number (i.e. map number) the row is linked to. Use the popup menu to select a link number. This can be a map, account or group number depending on the link type selected. Refer to Balance Origins for more information.
The link type is set from the default link type selected. You can change the link type for the individual row item if different from the default link type.
Click on column options to reveal column options. The settings here are similar to the 9 column settings. Additionally Filter settings based on percent and currency differences between the first column and the second/third columns. Only certain lines above a certain difference threshold (% or currency) will display.