The Project tab is divided into two panels (Figure 1‑7): the left-hand panel comprises four sub-tabs, each with one “Tree” representation of the Project that show the diverse interrelations between the Project’s elements; and the right-hand panel comprises seven sub-tabs, each with the “Definition Table” for one type of element. Clicking on an element in any tree view that is represented in a Definition Table (Reference, Amplicon, Read Data, Sample, Variant, MID, or Multiplexer) causes the right-hand panel to load the appropriate sub-tab Definition Table with the element selected. Expanding or collapsing a node in the tree or clicking on an item in the tree that is not represented in a Definition Table, such as a Read Group or an MID Group, does not impact the right-hand panel. You can click and drag the divider between the two panels to adjust the space assigned to each panel. If the size of your screen or the position of the panel divider does not allow you to view all the sub-tabs of a panel, a pair of arrow buttons appears in the upper-right corner of that panel, allowing you to scroll the set of sub-tabs to bring hidden ones into view.

A column of six buttons runs down the left edge of the Project Tab (some of which are inactive and grayed-out in Figure 1‑7), whose individual functions are discussed in detail in sections 1.3.1 and 1.3.2. These buttons are context sensitive in that the target of their actions can be either an object in the Tree or in the Definition Table panel, whichever was clicked last: the application provides a visual reminder of which panel is “active” (and will be subjected to the action of the left margin buttons) by surrounding the active panel with a thin blue, rectangular border. For example, Figure 1‑8 shows a Reference Sequence selected in the left panel and a Sample selected in the right panel, and some of the left margin buttons are active; the blue border is around the right panel, so the Sample from the right panel is the current target of the available buttons.