action.calculate = Calculate
action.select_all = Select all
action.select_highlighted_columns = Select Highlighted Columns
-tooltip.select_highlighted_columns = Press B to mark highlighted columns, Ctrl-B to toggle, and Alt-B to mark all but highlighted columns
+tooltip.select_highlighted_columns = Press B to mark highlighted columns, Ctrl-(or Cmd)-B to toggle, and Alt-B to mark all but highlighted columns
action.deselect_all = Deselect all
action.invert_selection = Invert selection
action.using_jmol = Using Jmol