I cannot turn the Volume all the way up to 11.

In Pro+, I get:
  • Off-page - scroll zoom to 5000% and no further.
  • On-page - 6400%.
  • Up/Down for drop-down - 4000%.
  • HotKeys - 1/2/3/4 all OK.
  • Zoom to selection - I added a small Box and zoomed to it (Shift+Alt+Z) then halved its size and zoomed again - it breaks and the design is no long accessible.

I tried with all Lines hidden and in Outline mode, same problems.

A new design handled the small left-most brush, the large brush and a small Box but you could see the application rendering breaking as it rendered all part of the large brush, on- and off-screen.
So the breakdown seems to be the available RAM for rendering (I'm using 32GB). As it breaks, it tries again from the start for all the brushes so with three, nothing works so I suspect the housekeeping does not clear out the buffer and so it chokes.

If you try and use a Live Effect, it messages: "Failed to setup bitmap for rendering. The requested bitmap may be too big."
I thought if I could lock a simple Live Effect, the rendering would be performed the once so it was a simple bitmap.
It could be an internal Xara rendering matter.

For this file, I deleted all the Lines and left the Box, it still stalls.
I copied all the Lines to a new file and all works.

Acorn