By default, the molecules and reactions in the pathways are represented by color-coded, round and diamond nodes, respectively.
Click the ‘Legend’ icon to open a panel which shows the color-coding of nodes.
‘Accessibility’ and ‘Availability’ icons can be turned on/off by opening the ‘Node Settings’ panel and checking/un-checking the accessibility and availability options.
Accessibility icons label target, commercial, published, and unknown compounds for increased visibility.
Availability icons label molecules that are commercially available on SigmaAldrich.com