Describe how to redrawing with a new scale.

It depends on the technology you want to use.

These days, most programs that produce images have a way to set the zoom factor. Changing that changes the scale of the drawing.

When copy machines are used for reducing or enlarging, the scale factor is set to something new by selecting the appropriate enlargement or reduction.

If you're drawing a graph, you change the scale by changing the number of units a grid line represents.