NO.... You never transfer any STEEM. STEEM belongs to you and stays in your wallet. The STEEM stored in SP generates votes. Those votes can be sold. It is done through Delegation. You are not delegating STEEM, instead you are delegating the votes generated from the STEEM. A person using your Delegation has no access to your wallet other than viewing it just like everyone can.
It is really the best form of investment. A normal investment requires you to hand over your money. That money is spent in the business activities. It could go towards payroll, construction, materials, operating costs, legal fees, etc. The most important point is that your money is spent. If the business fails, that money is gone because it has already been spent.
The difference with Steemit investment is that you keep your money. It stays in your wallet and no one but you has the keys to that wallet. Votes that are generated from your SP are highly valued and can be sold while your STEEM stays in your possession.
Hopefully that clarifies things.
delegated steem power is not shown beside my stem power wallet ..will it be happen automatically or there is a way to get delegated steem power (upvotes) from my steem or others source? please ans. me.
The only time delegation is automatic is when you initially sign up for a free account and it comes with a tiny amount. That delegation taken back over time by the owner. Any delegation to you will show a (+). Any delegation you you give will show (-). If you delegate to someone else, be sure to leave some small amount of that SP delegation to yourself. If you delegate 100%, your account will not function as the SP generates Bandwitdth. I recommend leaving at least 3 SP worth of delegation to yourself.
If you want to sell votes. Try using MinnowBooster. If you want to buy votes. Try using MinnowBooster.