If you want the feeling of "Instant" tools for free, install OpenNew . If you cannot install plugins, use 3D Warehouse (Method 2) and learn the Intersect Faces trick.
To create instant doors and windows in SketchUp Free, follow these steps: instant door and window sketchup free
Don't draw rectangles. Do this instead:
: Users can create custom style libraries using their own profile shapes for sills, lintels, and casings. Extension Warehouse Top Free Alternatives If you want the feeling of "Instant" tools
Once you learn this 3-click sequence, you can create a door in 5 seconds without any plugin. instant door and window sketchup free