How can I increase window title font size?
When monitor resolution is increased I want to increase title bar's font size as well. How can I achieve this?
Simply run following command on terminal:
gsettings set org.gnome.desktop.wm.preferences titlebar-font 'Ubuntu Bold 11'
Number 11 is default font size for title bar font, I believe you want to adjust their size to your preferred size.
Install unity-tweak-tool:
sudo apt install unity-tweak-tool
After than you can adjust the fonts for the different locations in that tool