When we are using the aggregate editor, we are shown a tabbed area (Pipline, Stage 1, Stage 2 ...). In each tab, we are shown a 3 column table with headings of "Stage #", "Operator" and "Specification".

In the Specification column, we are shown the JSON that describes our query / aggregation. However ... that specification entry is in a default font that is not fixed width. This makes it difficult to determine relationships if I am using indenting. This suggestions asks for the consideration of using a fixed width font for those "code" areas.