Making sure your colour is set to black (if it's not, click on the top colour square and change this 100% black) and select your brush tool.

确认你的前景色为黑色(如果不是，单击前景色方框，然后改成100%黑)，选择画笔工具。

youdao

Making sure your colour is set to black (if it's not, click on the top colour square and change this 100% black) and select your brush tool.

确认你的前景色为黑色(如果不是，单击前景色方框，然后改成100%黑)，选择画笔工具。

youdao