Interactive Fill tool can be used as a quick option to fill the object.
1. Open Corel DRAW.
2. Select Rectangle Tool and draw rectangle. Keep it selected.
3. Select Interactive Fill Tool. It's at the bottom most position in the tool box.
4. Drag from top left to bottom right. You will get the dotted line with the two small squares at the end. By default, the colors filled with black and white gradient.
5. Below menu bar, you will notice that the property bar is changed showing the properties of Interactive Fill Tool. Its showing black and white fill colors with Linear type of fill.
6. Change the colors and the type of fill using property bar. Experiment with colors and type of fill.
7.You can even go for patterns and texture fill using the same property bar.