A collection of default formatting attributes or styles are saved for every template of a prototype. Every widget created in a screen will use the styles defined in the associated template as default. All new projects start with a default template which defines all the styles for every widget. This set of styles may be edited, but not deleted.
Tip: Use different templates with different styles to easily change the look and feel of your prototype.
To change the styles defined for a specific template, right-click on the template in the Templates panel and select the option 'Edit Template Style'. A dialog will appear showing the current formatting attributes for every widget.
Default styles for specific widgets can also be edited from the Properties panel. If we want to set a widget's current style as default:
Select the widget on the screen.
Click on the button 'Set as default style for this widget' under the dropdpwn menu that appears when clicking on 
in the Properties panel.
Once we have changed the default styles for a specific template, we may also want the styles to be applied to all the already created widgets on the screens associated with this template. To apply the styles, first make sure the desired template is correctly associated with the screens you want to change the widgets' style from. Then right-click on the template and select 'Apply Template Style'. This dialog will appear:
The widgets you select here from all screens associated with the template you right-clicked will get the default style of the template.
You can also apply a default stored style to one specific widget from the Properties panel. To apply the default style to a widget:
Select the widget on the screen.
Click on the button 'Apply default style to this widget' under the dropdown menu that appears when clicking on 
in the Properties panel.