Spreading measures across page

I have a single cue in a big project that only consists of 5 bars. My fixed number of bars is set to 6 for the rest of the flows and I want to have this cue fill the whole page. What’s the easiest way to do this? Dorico lags when dragging the rectangle at the bottom, so I was wondering if there was a faster – more automatic way to do it.

Layout Options > Note Spacing > justify final system. Set the percentage to something lower or turn it off.

Thank you!