[Inkscape-user] Sizing :)

Hello people :)

I have made a logo of a project and now want to use it. But I want it to be 90x90 px and the borders to be a square. The logo now is very big and the size of the document is very big. Is there a way to automatically reduce the size to 90x90 or something near this and to place the object in the center vertically and horizontally.