If you want to send your Decent coins to another Decent wallet, you need to use "Send" option in the main application menu. You need to know the destination Decent wallet address for this purpose. Do not forget that inside light wallet application you can make only one currency direct transactions, for example, you are not able to make straight Decent to altcoin transaction. Also, while sending coins you need to remember about transaction fees. This fee goes to reward miners and support the Decent network itself.