How do I use the same widget within kv file - kivy

Question

I would like to define the form of a widget (in this case a spinner) just once in the kv file, but use it from multiple screens. Different input screens (menu1, etc) are called from other screens, many of them have spinners that I want to look identical. In this case I am using the simple spinner "color_spin."
I open menu1 from another window and this seems to work:
<menu1>:
name: "menu1"
GridLayout:
cols:1
Label:
text: "Properties"
size_hint: 0.6,0.2
pos_hint: {"x":0.2,"top":1}
Spinner:
id: color
size_hint_max_y: 50
text: 'Color'
values: 'White','Purple','Blue','Green','Yellow','Orange','Red','Black','Grey'
# Callback
on_text: [do my thing]
But I would like to have only 1 "color_spin" called from many different menus, so I would like to do something like this:
<menu1>:
name: "menu1"
GridLayout:
cols:1
Label:
text: "Properties"
size_hint: 0.6,0.2
pos_hint: {"x":0.2,"top":1}
Spinner:
[use spinner "color_spin", but how?]
<color_spin>:
Spinner:
id: color
size_hint_max_y: 50
text: 'Color'
values: 'White','Purple','Blue','Green','Yellow','Orange','Red','Black','Grey'
# Callback
on_text: [do my thing]
I am very new to kivy so I appreciate any input you can give.

Answer 1

First create your ColorSpinner:
<ColorSpinner#Spinner>:
size_hint_max_y: 50
text: 'Color'
values: 'White','Purple','Blue','Green','Yellow','Orange','Red','Black','Grey'
and then add it wherever you like:
<menu1>:
name: "menu1"
GridLayout:
cols:1
Label:
text: "Properties"
size_hint: 0.6,0.2
pos_hint: {"x":0.2,"top":1}
ColorSpinner:
id: menu1_color
# Callback
on_text: [do my thing]
<color_spin>:
ColorSpinner:
id: color
# Callback
on_text: [do my thing]