Try this :
Right click on the Rose online shortcut
Select properties : In the new windows select compatibility tab
At the bottom, click the Change high DPI settings button
In the new windows, make sure The High DPI Scaling override check (at the botoom) is unticked (Override high DPI scaling behavior)
Click Ok then Apply and test
ps: OR change the windows global scaling % to 100% : if you use 4K monitor, windows make the global scaling at 150% by default => Start > Settings > System > Display