Amy,
Are you wanting to adjust just the color that you're getting ready to paint with? If so once you've used the eyedropper to select a color from your photo, click on the foreground color in the toolbox. The Color Picker will pop up and you can adjust the Hue, Saturation, Brighteness or the amount of Red, Blue or Green in the color. Then paint or draw away with your new color. Sometimes I'll add a color as a stripe, shape or whatever to my LO and decide that it needs to be slightly changes to really look good. To do this I just
Adjust Hue/saturation or CTRL+U and play with the sliders to change the existing color a little.
Yep, using a brush would be the easy way to creat those big dotted circles. And you're correct that it is NOT a default brush in PSE. I know there are some floating around for download. I just don't remember exactly where at the moment.

You could also create you're one brush.
HTH! And if I misunderstood either question, please post and set me straight.
