Turbo C++ - Environment Settings
Turbo C++ version 3.0 environment settings can be changed with Options Menu -> Environemnt.
Under Preferences, we can change the screen size.
Under Edition Options, we can change the default extension, creating .bak files, tab space length,
We can also change the background color and text color of any window. In case, you want to change the string color in edit window, you can choose the following opttion in the screen shot.