Default "Ticket Fee" is 0.01 DCR/kb. If you want to pay more and have more probability to get a mature ticket, then adjust this up.
Choose your number of tickets: and click "Purchase".
Wow! That was fast. You finally staked your DCR!
Now, if you want to see the transaction and the amount staked, you must go to your Stake pool, and check your ticket.
Or use Decrediton (go to History) to see the latest transaction and lookup the transaction ID on: https://mainnet.decred.org
The DCRs are now locked up for an average of 1 month, but it can be half a year.
If you want to vote with your ticket; just click on "Vote Settings". Simple!
Wait... Vote?
Yes. Decred gives the power of voting to their token holders as well as the miners. It is more democratic than Bitcoin and Litecoin, and any other coin out there. Duh!