noun
clip indicator
A computing term for a marker or flag that indicates a clipping region or cut-out area in graphics or document processing.
この画像編集ソフトでは、切取り指示子を使ってトリミング範囲を指定します。
In this image editing software, you specify the cropping area using a clip indicator.
Compound of 切取り (kiritori, 'cutting out') + 指示子 (shijishi, 'indicator'). A technical term likely coined for computing contexts.