colorize

verb [vt. 及物动词]（借助计算机）给（黑白影片）着色

Step 3 : Click the colorize checkbox (circled in red below), and pull the Saturation slider all the way to the left. ^{第三步：将着色的选项打钩（画圈的选项），然后将饱和度的滑条拉到最左面。}