Fonts look incorrectly sized in Ubuntu Linux
If you are running Jalview in Ubuntu Linux and think that fonts look incorrectly sized, like the following screenshot,
![](/help/faq/gtkfonts/ubuntu_font_size_problem.png)
you can turn off the Ubuntu system default (for Java swing applications) Gtk “Look and Feel” by running Jalview with the environment variable JAVA_TOOL_OPTIONS by running Jalview with the following command:
JAVA_TOOL_OPTIONS="-Dswing.systemlaf=javax.swing.plaf.metal.MetalLookAndFeel" ~/opt/jalview/jalview
To make this option always apply you can edit the file
~/opt/jalview/jalview
(or the script “jalview” in the directory you installed Jalview into) and add the following to the as the second or third line:
export JAVA_TOOL_OPTIONS="-Dswing.systemlaf=javax.swing.plaf.metal.MetalLookAndFeel"
so that the top of the script should look like:
#!/bin/sh
export JAVA_TOOL_OPTIONS="-Dswing.systemlaf=javax.swing.plaf.metal.MetalLookAndFeel"
# Uncomment the following line to override the JVM search sequence
# INSTALL4J_JAVA_HOME_OVERRIDE=
# Uncomment the following line to add additional VM parameters
# INSTALL4J_ADD_VM_PARAMS=
Note that if you are also having problems with the Jalview interface appearing too small on a high resolution (HiDPI or 4K) monitor then also see the FAQ Jalview’s Menus and Fonts are too small on my Linux machine