@@ -161,7 +161,7 @@ protected function _renderHorizontalAxisGeneralSettings() {
161161 echo '<tr> ' ;
162162 echo '<td class="viz-section-table-column"> ' ;
163163 echo '<select name="xAxes[scaleLabel][fontFamily]" class="control-select"> ' ;
164- echo '<option> </option> ' ;
164+ echo '<option value=""> ' , esc_html__ ( ' Default ' , ' visualizer ' ), ' </option> ' ;
165165 foreach ( self ::$ _fontFamilies as $ font => $ label ) {
166166 echo '<option value=" ' , $ font , '" ' , selected ( $ font , $ this ->xAxes ['scaleLabel ' ]['fontFamily ' ], false ), '> ' ;
167167 echo $ label ;
@@ -171,7 +171,7 @@ protected function _renderHorizontalAxisGeneralSettings() {
171171 echo '</td> ' ;
172172 echo '<td class="viz-section-table-column"> ' ;
173173 echo '<select name="xAxes[scaleLabel][fontSize]" class="control-select"> ' ;
174- echo '<option> </option> ' ;
174+ echo '<option value=""> ' , esc_html__ ( ' Default ' , ' visualizer ' ), ' </option> ' ;
175175 for ( $ i = 7 ; $ i <= 20 ; $ i ++ ) {
176176 echo '<option value=" ' , $ i , '" ' , selected ( $ i , $ this ->xAxes ['scaleLabel ' ]['fontSize ' ], false ), '> ' , $ i , '</option> ' ;
177177 }
@@ -265,7 +265,7 @@ protected function _renderVerticalAxisGeneralSettings() {
265265 echo '<tr> ' ;
266266 echo '<td class="viz-section-table-column"> ' ;
267267 echo '<select name="yAxes[scaleLabel][fontFamily]" class="control-select"> ' ;
268- echo '<option> </option> ' ;
268+ echo '<option value=""> ' , esc_html__ ( ' Default ' , ' visualizer ' ), ' </option> ' ;
269269 foreach ( self ::$ _fontFamilies as $ font => $ label ) {
270270 echo '<option value=" ' , $ font , '" ' , selected ( $ font , $ this ->yAxes ['scaleLabel ' ]['fontFamily ' ], false ), '> ' ;
271271 echo $ label ;
@@ -275,7 +275,7 @@ protected function _renderVerticalAxisGeneralSettings() {
275275 echo '</td> ' ;
276276 echo '<td class="viz-section-table-column"> ' ;
277277 echo '<select name="yAxes[scaleLabel][fontSize]" class="control-select"> ' ;
278- echo '<option> </option> ' ;
278+ echo '<option value=""> ' , esc_html__ ( ' Default ' , ' visualizer ' ), ' </option> ' ;
279279 for ( $ i = 7 ; $ i <= 20 ; $ i ++ ) {
280280 echo '<option value=" ' , $ i , '" ' , selected ( $ i , $ this ->yAxes ['scaleLabel ' ]['fontSize ' ], false ), '> ' , $ i , '</option> ' ;
281281 }
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