Restoring the Materials Inspector dialogbox

i have accidentally crossed off the vertical bar on the right side of the screen which allows me to change the colour of things - such as brick, grass, white etc. how do i get this back?

Which version of SketchUp? For SU2015 and earlier, look under Window and select Materials. SU2016: If it’s missing from the Default tray, go to Window>Default Tray and select Materials.

SU2016 yes ive got it now thank you