SketchUp 8 has not been supported for more than 5 years. There is no legitimate source for SU8 Pro anymore. It's time to move on to the current version. As long as you are using it for personal, hobby use, you can use SU2017 Make which is available at no charge.

Reset the axes then you can rotate the model to the axes. First set the solar north so you can have your sun study.

Don't use "Hide". Use layer control. Just setup layers for things you want to see or hide. Then set the layer control within each scene. The individual scenes in SU will remember the layer routine so you don't have to.

"Whoa, I only speak two languages, English and bad English"...Bruce Willis Beside the fact I cannot speak russian, metric is not terribly useful in this country either...in less your a chemist. I would pay real money for a piping program that works. Amazes me nothing has been developed for this. Sketchup has some great features, but it really sucks for anything mechanical. They should develop this if the want to keep beating down autocad.