If you are using Eclipse, you have probably needed to change font size at least once. Changing the font size in Eclipse is a somewhat cumbersome, you need to go Window -> Preferences -> General -> Appearance -> Colors and Fonts, find the relevant editor and change its font.
Personally I have suffered from this many times. Finally I decided to add the ability to change font's size quickly to tarlog-plugins, so please welcome the tarlog-plugins 1.3.
This plugin extends the 1.2.3 version with the following key bindings:
Ctrl++ will increase font.
Ctrl+- will decrease font.
You can change these bindings from Preferences -> General -> Keys.