Let us work with the crop tool to crop the object. Always remember that it work with the object particularly if you have selected it else without selection it works for all the objects present in the window.
1. Open Corel Draw.
2. Select Rectangle tool and draw 3 rectangles. Fill it with different colors and place them near by. Select any one rectangle with pick tool.
3. Select Crop Tool (marked with green circle in the image below).
4. Define the cropping area. Drag the tool to cover the half area of all the rectangles.
5. Double click inside the cropping area.
6. You will find that only selected rectangle is cropped. Rests of the rectangles are intact.
7. Repeat the same procedure but do not select any rectangle.
8. All the rectangles are cropped.