For a controller to "cause" Ableton Live to display such a rectangle (in any dimensions of height and width) you need to create a Py script for it. If you search Ableton Live's resources directory you will find scripts there for controllers like Launchpad, APC 40, Push to name a few.
One could possibly, then make a "replica" of such a controller in Lemur and then "trick" Live into thinking its the original, script intended controller so display that rectangle. BUT its not as easy as it sounds, because most of these controllers feature a so called "secret handshake" meaning, Live sends a (sysex usually) midi message to the device, the device "replies" and if the "discussion is fruitful" Live will "accept" to show the rectangle and work as intended.
So, in simple words, one has to dive deep into PY scripting or have one of these devices and try to "guess" the "request-reply" function. As newer the device though, the harder this "handshake" code becomes - understandably as manufacturers wouldnt actually LOVE it if for example I made a simple customisable CC controller work like Push.
That said, there are many emulations of famous devices in the user library such as Mackie Control Pro, Launchpad, Push and others. Your other bet is to google the internet and see how how you can make your own PY script with the related rectangle and functions. There are some tutorials out there last time I checked, but in all honesty I cant be arsed at the moment - the release of Bitwig and its OPEN SOURCE API for controllers is how things SHOULD have been done in the first place.
Hi there! thanks for the answer...
but in "livecontrol2" you can do this but ith a grid of 12 scenes... here is a pic of a livecontrol2 template ith out anithing but the scroll bar that scrolls the grid in live... i think it might be possible just to change the size of this grid from 12 scenes to 1
or am i wrong?
Noone said its not possible! LiveControl2 comes with its own set of PY scripts - look in the directory I mentioned above and you'll find them (they are automatically installed when you run the Live Control installer). Changing the grid to your liking is as simple (or as complex ) as editing those files to your liking.
Hi
Live includes some generic scripts and tools/info for making your own instant mappings aka Red Box . . . etc
And there are a number of web resources that can help you along that path as well
LiveControl will have a lot of other stuff in it all that may not be needed or may cause unexpected issues
Basically like most computing things lots of different ways to achieve similar end results - it just depends on your skills and time etc . .
So really any of the ways mentioned will work in some way... go for it . ...
Cheers
MM
Well, Thanks for your answers.. But íts hard to me even to understand all the things You wrote on your answers .... Because im from Spain and my English is not that good...
Well i have nothing resolved, not because of You, You intención is great but íts for my bad English i tried to translate but even that way íts hard to take anything clear
) as editing those files to your liking. 
