Is there a way to convert widget offsets to min/max values?

For widget alignment, you can use anchors and offsets. But these are fixed amount (aside from DPI scaling). For percentage alignment, you need to use the min/max properties. What I’d like to do is position my widget and then use percentage alignment. So is there a button or menu to convert offset to min/max values and zero out the offsets?

I need this in the editor.