What are you doing to enlarge it?
What operating system do you have? Which processor are you running with how much RAM?
Which graphics card do you have? Have you manually gone to the Intel, AMD or nVidia web site to ensure you have the latest drivers?
Like usual just try to drag it down but nothing happens
iMac 27 inch with OS X Yosemite
2,66 GHz Intel core i5
ATI Radeon HD 4850 512 Mo
I did erase to program and re install it no change ?
Maybe my project is corrupted?
Thanks for your help !
I have no idea why this wouldn't work. It works fine on my El Capitan.
Though you description "Like usual just try to drag it down but nothing happens" doesn't offer any clues what you may or may not be doing.
I gave up I will start a new project.
Thanks for your time