If it isn't already selected, click the Select tab.
Select a collection from the Styles Collections drop-down list, such as Default Styles, Color Sets, or Sketchy Edges.
Select a style from the drop-down menu.
Toolbar for Styles:
Select View / Toolbars and then Styles on the PC. Select View / Customize Toolbar on the Mac, then drag the Styles toolbar onto the main toolbar. If you swap styles frequently (or if you *should* switch frequently), keep this toolbar handy.
Style Builder is included with the SketchUp Pro subscription. You may make your own sketchy edge style with this handy little application using lines you've drawn yourself, either on paper or digitally in an image-editing programme.
Simply follow these procedures if you ever wish to modify the default template: Window > Preferences (Microsoft Windows) or SketchUp > Preferences (SketchUp) are the options (Mac OS X). Select the Template choice from the left-hand sidebar. In the Drawing Template list box, choose one of the templates.
By toggling the Styles panel open in the Default Tray, you can access it. Alternatively, go to Window > Default Tray > Styles and check the Styles box. Select Window > Styles to bring up the Styles panel.