contracting shapes with voids

Use select shape to select the void, then edit the void. 

Try the below suggested steps-
1 In the Options Tab, select or make the Boundary Class visible.
2 In the Find filter, enable the 'Voids/Cavities' objects and hover your cursor over a void, the void is highlighted.
3 Right-click and choose 'Expand/Contract'.
4 Set value in the Options tab which in your case would be the 'x'.
5 Use the - button to contract the void. The void will be contracted by x amount without changing the size of the shape.
6 Right-click and choose Done from the pop-up menu.

Try these steps as it would help to contract the voids inside shape by an 'x' amount without changing the size of the shape.

thank u for ur response.

 i was able to offset a void only in a shape.

i did not know there was a void item in the ffind filter.

regards

masa