Mask Display(マスク表示)

This popover controls how masks are displayed in Mask mode.

Spline(スプライン)

Toggles the display of the mask splines. Note that if they're hidden, you won't be able to edit them.

Edge Display Type(辺の表示タイプ)

Line style of the splines.

Overlay(オーバーレイ)

Visualizes masks by shading the whole clip.

Overlay Mode(オーバーレイモード)
Alpha Channel(アルファチャンネル):

Displays just the masks as a grayscale image. Excluded areas are black, while included areas are white.

Combined(統合):

Displays the clip with excluded areas darkened.

Blending Factor

How much excluded areas are darkened when using the "Combined" Overlay Mode.