I'm not sure this is exactly what you mean but try this [alter sizes and step numbers to your needs]: Choose the paintbrush tool. In its options bar, pick the hard 19 pixel brush. Click on the brush thumbnail in the options bar and in the edit brush dialog, change the brush spacing to 100% [note; spacing will not "stick" once you switch tools unless you save this as a new brush]. Now go to the end of the paintbrush's options bar and click on the Brush Dynamics button. In Brush Dynamics, set both Size and Opacity to Fade and for Steps, enter 20 for both. Paint a long stroke and see if this is what you're after. If it is, tinker with the brush size, spacing and number of Fade steps to get the result you're after. You can make a custom brush of a bunch of dots lined up vertically if you want to make a bunch of dot rows simultaneously. -Jay Arraich