Some GL Accounts can be bulk set. Grouped items can be identified by the + sign on the left-hand side.
These can have GL Accounts bulk set by selecting an option from the corresponding field on the right-hand side. All GL Accounts in the selected group will be updated based on the option selected.
To change an individual item in the group, select the + icon to open the grouping. A GL Account can then be set individually by changing one of the fields on the right-hand side.