Rendering Issues

Linux users (Windows users too?) sometimes experience rendering issues in the mind map view and/or font rendering. First you need to check the Java version you are using: it should be openjdk-7 or openjdk-8 (openjdk6 should no longer be used). That means you have to install openjdk-[78] (or similar) package and activate it (Debian/Ubuntu: update-java-alternatives). If that doesn't help, below are some hints that have helped a bunch of people.

The Arch Linux wiki has some important hints regarding java (swing) rendering.

Relevant discussions

• artifacts when scrolling horizontally (but the workaround -Dsun.java2d.xrender=True sometimes causes other, more severe, font rendering issues)

Things to try

• change the Look&Fell to metal: Tools->Preferences->Appearance->Look and Feel (this has fixed the issues in most cases!)
• from the Arch Linux wiki (see above)
  • run with -Dawt.useSystemAAFontSettings=on -Dswing.aatext=true
  • install "ttf-ms-fonts" package
• -Dsun.java2d.xrender=True (see thread above): you only need to un-comment a line in freeplane.sh (this is enabled by default in openjdk-8!)
• change Tools->Preferences->Appearance->Antialias

If you need help, post in the open discussion forum.