When I use some tools, such as Point at distance and angle, a window will open. Usually in Windows 10 I can take the window with the mouse and move to see the paths below.
But in Ubuntu I can’t do it, because all the Seamly2d window moves and change size.
can you be more specific and please attach screenshots if possible. We will try to identify and fix issues. It is possible that what you describe is an issue with the Qt package that provides the support for graphics on different platforms (windows and Ubuntu). It is also possible that we can help you to find updated versions of Qt that would fix the problems for you.
Can you please start with the Help menu item and tell the date and time of the build and version of Qt. These can be found in the window shown when you choose "About Seamly2D from the help menu