The purpose of the "Explorer" page is to interactively visualize chemical space embedding prepared in the "Creator" (Figure ). In the created visualization the users can explore compound bioactivities, physicochemical properties, and other measurements for various representations and parts of chemical space. Thanks to ChemSpace.js up to 5 dimensions can be shown in the map at the same time: X and Y coordinates, point color, point size and point shape. The map can be zoomed in by drawing a rectangle over a group of points. Such points form a selection and their detailed information is then displayed under the "Selected List" (Figure ) and "Selected Activities" tabs (Figure ). Figure View of the "Selected List" tab of the "Explorer" page. The tab shows the selected molecules in the map as a list which is the same as the one used in the "Compounds" view (Figure ). For easier navigation, the compounds are also grouped by the compound set they belong to and the view for each set can be accessed by switching tabs above the displayed list (only one compound set, CHEMBL251, is present in this case). Therefore, the frontend GUI comprises a large library of over 50 React components that are encapsulated in a standalone package (Figure ). The package is organized into subpackages that follow the structure and hierarchy of design elements in the GenUI interface.