On the landing page, users can select the transition monitoring module and, within it, choose either to monitor the status of the GTS-to-WIS2 transition or the status of the TAC-to-BUFR transition. The control menu then allows users to select the report type (SYNOP for surface land observations or TEMP for upper-air land observations), the period (currently daily only), and the date of interest. A map subsequently displays the statistics corresponding to the selected options. Note that the date selection is subject to a 48-hour delay. The tool offers several ways of zooming into the map to view the status of a particular region or country: either by scrolling with the mouse wheel or by clicking on the zoom buttons on the map's upper right corner. Also, by selecting the full-screen toggle button, the map can be seen in full-screen mode. The ability to show or hide the legend by utilising the legend toggle on the map's upper right-hand side is another important feature. In addition, it is possible to display on the map only the stations that fall into a particular category by clicking onto each status category (coloured dots) in the legend. Each of these can be disabled and made invisible on the map display. The WDQMS web tool provides a search function that allows to search for stations by name or WIGOS ID on all views. The top-left corner of the map's magnifying icon can be used to access it. A Download feature is also available, allowing the user to download a CSV (Comma-Separated Values) file with a summary of the information seen on the map. This makes the data displayed on the map machine readable and exportable, thus enabling other systems to use the information in the WDQMS web tool. The Download feature is accessed in WDQMS maps through the “Download data” link in the bottom right-end corner underneath the map. All CSV files contain the list of stations and their respective status monitoring statistics corresponding to the selection (i.e., report type, date and period).