The Vector Replacement window allows you to replace the content of the original layer with a vector drawing. For example, you can replace a blank rectangle image from your layer to a blank vector in your final project (it saves you space because vectors are rendered in real time and do not exist as an external image). Select the layer you want to replace and click the Vector replacement. The following window appears:

Information about the current layer content will appear in the top of the window (position and size).