When you place a bitmap image over a colored background in CorelDraw, you may not want the solid bitmap background to obscure the object underneath. You can drop out the background color with the bitmap color mask.
Difficulty: Easy
Time Required: 2 minutes
Here's How:
- With your CorelDraw document opened, import the bitmap into your document by choosing File > Import.
- Navigate to the folder where the bitmap is located and select it. Your cursor will change to an angle bracket.
- Click and drag a rectangle where you want to place your bitmap, or click once on the page to place the bitmap and adjust the size and position later.
- With the bitmap selected, go to Bitmaps > Bitmap Color Mask.
- The bitmap color mask docker will appear.
- Make sure that "Hide Colors" is selected in the docker.
- Place a check mark in the box for the first color selection slot.
- Click on the eyedropper button, and click the eyedropper on the background color you want to remove.
- Click on apply.
- You may notice some fringe pixels remaining after clicking apply. You can adjust the tolerance to correct for this.
- Move the tolerance slider to the right to increase the percentage.
- Click apply after adjusting the tolerance.
- To drop out additional colors in the bitmap, select the next checkbox in the color selector area and repeat the steps.
Tips:
- If you change your mind you can use the edit color button to change the dropped out color, or simply uncheck one of the boxes and start over.
- You can save the color mask settings for future use by clicking in the disk button on the docker.
- These steps were written using CorelDraw version 9, but they should be similar for versions 8 and higher.

