Component styling - is it possible to attach default styling or change it?

Hello,

I can’t find anything about it as the keywords for my question describe something totally different.

Now, we know the components in Figma on default are white background and this purple dotted background. Sometimes, when I create a component (especially from an element that’s already there), it doesn’t add the background or purple border.

Now, of course you can create it manually but is there a way to just use this styling with one click or a shortcut so that a component becomes visibly a component (white background / purple dashed border)?

Second question: is there a way to change this default styling of components (white / purple)?