I am using the application TreeSheets, which is something like Excel on steroids. And I want to be able to view two "spreadsheets" side-by-side. Sadly, the application itself does not offer this as an option, and automatically puts each newly opened document in a new tab, without even the possibility to "arrange windows" within the main application window as known from Microsoft Office products.
Is there any trick to trick the application into starting a second time? Maybe something on a window manager level? (I am using KDE + xmonad; it is OK if it is a hack which happens to produce something ugly like a tab without visible menus or window decorations). Or maybe somehow forcing the program to start in a second, different process.
I don't need the two instances of the program to somehow "know" each other (as opposed to Excel spreadsheets where you can refer to the cells of a different spreadsheet file). All I need between the two is simple clipboard functionality for copying and pasting plain text.
I don't mind using inelegant tricks as long as it works. My current solution is to open the second spreadsheet on a second computer with Synergy; anything less painful is welcome.