You can change the size of an existing sketch. Note that the resize factor you specify is not absolute, but relative to the current size of the sketch.
To resize a sketch,
1. Click Insert and then, in the Sketch group, click Properties.
2. Select the sketch in the viewport or double-click the sketch in the Drawing Browser.
The Sketch Properties dialog box opens.
Alternatively, select the sketch in the viewport, right-click, and select Sketch Properties from the context menu. Set the preselection focus on the Status Bar to Sketch or All to preselect the sketch. You can also select double-click the sketch in the Drawing Browser and click on the Command Mini Toolbar.
3. Under Resize, click Reset to set the sketch to the initial size of the sketch as when selected.
4. Click Proportional to proportionately resize the sketch in the horizontal and vertical directions.
5. Specify the new dimensions of the sketch as either absolute values or comparative percentages.
Properties.