Created attachment 2366 [details]
Design - Selecting machines from the layer details pages

When I click the 'select machine' button in the layer details page, I am brought to the project page with the new machine set. No notification of the change is shown, and I get no visual cues as to what has happened in the page.

When discussing the design of this process, the team observed that changing the project machine is a big change that is probably not done very often and that invalidates all history of the project somehow, since builds are not comparable across machines. To account for this fact, the process of changing the machine should be a bit more complicated than just clicking a button. 

With this in mind, we designed a 2 step process for machine selection from the layer details pages, which you can see by visiting

http://www.yoctoproject.org/toaster/all-machines.html

Click on the 'all layer' button of the first machine in the table, then click on the 'select machine' button.

I've also attached a design document that explains the stages of the process.