Quantified lists are one of the standard data structures in Catacomb models. They allow extra data to be associated with items selected from a list.
The editor presents, on the right, buttons for all the known elements of the target type ( things that could be meaningfully included in the quantified list). The refresh list button at the bottom causes the list to be reread and the buttons updated in case something has changed. The edit ingredient list button gives access to the list of possible components.
Items are added to the quantified list by clicking the corresponding button. This brings up a context-dependent display in the lower panel of what data can be associated with the particular item. When editing a solution for example, this would be the concentration of each solute and the units of that concentration. Items can also be examined by selecting them in the list of present ingredients on the left. The remove ingredient button does that, removing the currently highlighted item in the list on the left.