Activate the Brush tool (B) and then in the Options Bar above, set it to a 19 pixel, hard edged brush, Normal, Opacity 100%.

• 启动电刷工具(B)和然后在选择项中除上方之外；将它设定为一个19图素；努力地使了电刷，正常，不透明度100%25锐利.