Sie suchten nach: replace (Englisch - Jiddish)

replace
layer-mode-effects

replace selection with path
vectors-action

replace the current selection
channel-ops

one frame per layer (replace)
always use default values

replace the selection with the layer mask
layers-action

replace the selection with the layer's alpha channel
layers-action

do you want to replace it with the image you are saving?
tool options, layersdock