unpost; cancel display
Computing term for removing a previously posted or displayed item, such as a message or image, from a screen or online platform.
I posted it by mistake, so I performed an unpost.
You can cancel the display with this button.
取消し means cancellation in general, while 表示取消し specifically refers to canceling a display or unposting.
Compound of 表示 (display) and 取消し (cancellation).