Configuration 
It is possible to configure fx by setting environment variables.
FX_SHOW_SIZE 
Fx can show the number of elements in arrays and objects.
bash
export FX_SHOW_SIZE=truePress s s to show/hide sizes.
FX_LINE_NUMBERS 
Fx can show line numbers.
bash
export FX_LINE_NUMBERS=truePress s l to show/hide line numbers.
FX_NO_MOUSE 
By default, mouse events are redirected to stdin. To disable this behavior, set the FX_NO_MOUSE environment variable.
bash
export FX_NO_MOUSE=trueTIP
It is possible to select text in fx, even with the mouse enabled, by holding one of the following keys:
| Key | Terminal | 
|---|---|
| fn | Terminal.app | 
| option | iTerm2, Hyper | 
| shift | Linux | 
FX_COLLAPSED 
Fx can be configured to start with collapsed nodes by default.
bash
export FX_COLLAPSED=trueFX_INDENT 
Fx allows you to customize the indentation. The value can be either a number (like 2 or 4) or a string.
FX_THEME 
Fx can be customized with a theme.
bash
export FX_THEME=5To preview available themes, run:
bash
fx --themesAdd your own theme in theme.go and create a pull request.