Currently, the pull-down menu for displaying global vs. limited taxonomic sources resets all sources (turning all sources off) when you change the option in the pull-down menu. This is undesirable behavior; users should be able combine multiple sources at once. I suggest one of two solutions:
Revert to the original design, in which toggle buttons for all sources are displayed at once. Remove the pull-down and simply divide the sources visually into two sections, with global and limited headers.
Keep the pull-down menu, but do not reset the sources when the user selects a new value from then pull-down. All toggle buttons would stay as set by the user. Also, perhaps display all currently active sources in the Taxonomic Sources header? Also, a separate reset button (turning off all sources) might be helpful. This option is more complex than the preceding solution.
Currently, the pull-down menu for displaying global vs. limited taxonomic sources resets all sources (turning all sources off) when you change the option in the pull-down menu. This is undesirable behavior; users should be able combine multiple sources at once. I suggest one of two solutions:
Revert to the original design, in which toggle buttons for all sources are displayed at once. Remove the pull-down and simply divide the sources visually into two sections, with global and limited headers.
Keep the pull-down menu, but do not reset the sources when the user selects a new value from then pull-down. All toggle buttons would stay as set by the user. Also, perhaps display all currently active sources in the Taxonomic Sources header? Also, a separate reset button (turning off all sources) might be helpful. This option is more complex than the preceding solution.