How can I change the font size of JForex's strategy editor under Linux?
There are three things that come to mind that you can try:
1. Consider using Eclipse or NetBeans for JForex development.
Use in Eclipse: https://www.dukascopy.com/wiki/#Use_in_Eclipse
Use in NetBeans: https://www.dukascopy.com/wiki/#Use_in_NetBeans
2. Request new feature: https://www.dukascopy.com/swiss/english/forex/jforex/forum/viewforum.php?f=128
3. Consult with External Programmers whether it would be possible to develop a JForex plugin that would allow you to do that.
External Programmers: https://www.dukascopy.com/fxcomm/members/?services=program_service