Hello, I'm Elia and it's the first post I make .. Meanwhile, thanks for the work you all do ..
I'm writing to you about a project that came to my mind .. i am looking for a solution for when I go out with my videomaking equipment. The idea was to create various INVENTORY sections and to match each button with an element to put in the backpack. Once pressed on the button this will light up green .. save / delete etc .. All simple so far, the problem is that I realized that it is not "publishable" .. Being dedicated only to what is my equipment. To make it publishable, it occurred to me to create a single EDITABLE button directly from the app .. so that the user has the possibility to customize the scenes with his equipment. is it possible to do such a thing with MIT 2?
thank you very much and sorry for my english from google translate 
I am not sure what you mean by single editable button Nuvole . I guess you want to be able to edit a list of inventory. This link describes one method to edit a List.
Problem Editing Text from List Picker selection and it might be what you want to do.
it's hard to explain.. an editable botton that everyone can modify and drag and drop in a screen from the appinself.
Please try harder. Perhaps you want to do this or something similar using Dynamic Components extension by Yusuf Ciha
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Here are some resources to help you learn to use the AI2 tools. A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook http://www.appinventor.org/book2 ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.
There is a free programming course here http://www.appinventor.org/content/CourseInABox/Intro and the aia files for the projects in the book are here: http://www.appinventor.org/bookFiles
How to do a lot of basic things with App Inventor are described here: http://www.appinventor.org/content/howDoYou/eventHandling .
Also look here App inventor español. Offline. Tutorial. Ejemplos. Instalación. Códigos. Juegos. Curso gratis de App inventor. and here Tutorial Index | imagnity for more tutorials.
Learn about components Component Reference
and visit the Library The MIT App Inventor Library: Documentation & Support Help>Library on the MENU
Do you shoot multiple scenes at different locations at the same time, making it impossible to reuse equipement across those scenes?
No, once the app has been created, exported and shared, it is possible for the user who uses it to personalize the buttons to their liking .. Example .. I use a Canon camera, maybe the other user is using a Nikon. My button will be different from his. Having the ability to create buttons with the app already exported. Hope you understand now sorry for my bad english.. 
@Nuvole_e_Montagne, I made an app that you can customise buttons to your own.
Download this then upload it to your projects and try it out! HELPPEOPLE2.aia (4.4 KB)
If you wanted them to be able to move the buttons then just switch out the buttons for pictures on a canvas, then use the same code I showed and make it so when Image dragged, put X and Y to where the users dragging X and Y. Hope this helps you out.
Brady
thank you so much i will try it tomorrow
Your welcome and Happy New Years!
This sample project contains parts you can use.
If you replace equipment with PLAYERS and
replace scenes with TEAMS.
Ignore the parts of the app that set up matches and scores.