How can I resize the part I draw by apple pencil?

I drawed a cube by using apple pencli. Now I want to make it smaller. So I try the solution in the article.

"If you circle a portion of the drawing with the lasso, a dotted line in motion will surround what's been selected. If you tap and hold part of the drawing, two yellow resize handles will highlight what's been selected and you can move those handles to expand or decrease the selected area."

I can't see two yellow resize handles. Is anyone have this issue?