8 Press the Brushes icon in the Toolbox. A default set of brushes appears. Select the largest soft-edge brush. 9 Paint around the edges of the image. Note: A paintbrush may be edited from the Brushes palette. To do so, click on the paintbrush icon in the Toolbox and drag it away so the Brushes palette floats. Once open, double-click on the brush that you wish to edit and enter your adjustments. Depending on the type of brush that you are using, this feature will allow you to adjust pres- sure, diameter, and the opacity of the brush stroke. Also, various modes — special effects that allow you to create custom mixing and painting effects — are available for your use. If you are new to paint- ing we suggest that you take a minute to explore the paintbrush fea- ture and review the section “Painting and image-editing”  in the Canvas User’s Guide. Because you are painting in the channel mask, the areas you paint become transparent. Continue painting until you have achieved an effect that you like. Black pixels in a channel mask produce 100% transparency in corresponding areas of the masked object. White pix- els in a channel mask produce 0% transparency in the masked object. Gray pixels in a channel mask produce partial transparency in the masked object. Darker grays produce greater transparency than lighter grays. 10   Press Esc to end edit mode. You now have a nice airbrush effect on your paint object. Selecting a brush Tip If you make a mistake, you can undo the most recent actions by choosing Edit > Undo or Window > Palettes > Undos. You can also press Com- mand+Z (Mac) or Ctrl+Z (Win- dows). Transparent edges can be “painted” in a channel mask. You can achieve a variety of effects with various painting tools. You can also adjust options for most painting tools in the Brushes palette.
Canvas 8 Help: Introduction to image editing (8 of 12)                                              Page #42