I have downloaded Revit 2013, it seem there is an issue with my tool, for example, if I click on stair tool, once i finished sketching the stair case, then if i try to mofify the profile of a wall, revit doesnt give me the tool to modify the profile.
It looks revit locked it self in one tool even when i finished using the previous tool
Are you using Windows 8 or Windows 7 with .NET 4.5 installed?
It could be because you have .NET framework 4.5 on your computer. To fix it, try to download and install the latest Revit update here: http://knowledge.autodesk.com/support/revit-products/downloads/caas/downloads/content/revit-2013-upd...
Note: the provided link is for Revit 2013. If you use Revit Architecture, MEP or Structure as separate product, you need to download specific update.
If this can't fix it, then it must be graphic card related problem.