How to change environment's font size?

Currently it is not possible to change the font family or size outside the editor. You can however zoom the entire user interface in and out from the View menu.

Update for our VS Code 1.0 release:

A newly introduced setting window.zoomLevel allows to persist the zoom level for good! It can have both negative and positive values to zoom in or out.

Just copy "editor.fontSize": 18 into your setting.json of the editor.

Pressing Control+Shift+P and then typing "settings" will allow you to easily find the user or workspace settings file.

In Visual Studio Code, by pressing Ctrl+ and Ctrl- you can change the overall font size of the IDE. This helps faster than changing settings in every session. Hope it helps...