How do i change the value of dimensions, for example when its 12cm, how do i make it say like 10cm while keeping the same drawing. Its like i wanted to fake dimensions. Sorry if this is obvious but im very new and been making only very basic drawings.
You can override the real dimension value during drawing the dimension in the Tool Options bar above the drawing area, often overseen.
Or manipulate an existing dimensions via Tools - Modify - Properties.