This plugin allows you to take a screenshot of the whole editor in one click. It will save your active Editor as .png file. The default hotkey is Ctrl+Alt+Shift+Q. You can change it in Settings > Keymap > Plugins > Advanced Screenshoter. Some other preferences stored at Settings > Tools > Advanced Screenshoter.
Examples:
You can try it at https://plugins.jetbrains.com/plugin/16688-advanced-screenshoter