iMac wireless keyboard

I have to use the Keyboard Viewer to communicate. How do I get all the keyboard back? The main problem is not being able to type the letters.

And this on a what using which operating system? And by Keyboard Viewer are you referring to symbols etc? If so have a read of this:-


OS X Mavericks: Use the Keyboard Viewer

And writing a post:-


http://www.mac-forums.com/forums/news-community-announcements/313284-writing-quality-post.html

Thank you. Didn't realize I needed all the info for my late 2013 iMac I finally got the keyboard working... Don't know what I did but It is now working OK.
Model Name: iMac
Model Identifier: iMac14,2
Processor Name: Intel Core i5
Processor Speed: 3.4 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 16 GB
Boot ROM Version: IM142.0118.B02
SMC Version (system): 2.15f2

Another question maybe you can help me with: I used to be able to click on the icon of the window or file name I wanted to open. Now I have to "right click" on the window or icon and select "Open" to select the file. Is that a change or is there a way to get it back so all I have to do to open a file is to click on it?

Thank you for your help.

where are you trying to open them from?

From Finder, a double click is needed, from the dock it should just be one