If you need to create more workspaces you can right click on the "Pager" AKA Workspace thing then open "Configure Desktops" and from there add some workspaces. Right now I do not think there is a way to get to that configuration panel from the control panel.
The effect in
this image is one of the new compositing effects for KWin in case you did not know. Be aware that the compositing sometimes does not work on some systems, hopefully it will for you. To enable it goto System settings, Desktop, then enable "Enable Desktop Effects." The effect should be on if "Improved window management" is enabled. After that to use the effect hit Ctrl+F8.
O_o