As Ian says. For conformable clothing, you'll probably see the model poking through the clothing. Right after you add the clothing model, make sure it is selected (it should be by default, but you might click on some part of the first figure by accident) and choose 'conform' from the 'figure' menu. The clothing should snap right into place. Once you have clothes you've downloaded into the right places in your Runtime folder, the process is the same. Some things, like hats or jewellery, might be props rather than conforming figures. If they're 'smart props', they'll stick onto the figure where they're supposed to be and move with the figure. Some you might have to parent to the figure: this is under 'figure' /'set figure parent', I think. You might have a look at some of the tutorials on this site (click the 'Tutorials' link in the main title bar). Lots of truly excellent people have written great beginning level tutorials to help you out wher ethe manual leaves a little (or a lot) to be desired. Have fun!