Change keyboard shorcut for switching desktop workspaces I am working on MacOS Sierra and wanted change desktop workspaces quickly.
For this, I used the keyboard shortcut under Mission Control and selected all the tick boxes for Switch to Desktop N.

The shortcut key for this was ^1.

Another shortcut is ctrl+ -&gt;/&lt;-. But,  I wanted to change it to alt+-&gt;/&lt;- so that it can be done single-handedly. How should I do this?

EDIT:  I want to use only the right alt and not left alt for the above purpose.
As you said, you can go to the Preferences System, then Keyboard, then to the Shortcuts tab.

From here,


You select the line you want to change the shortcut of
You click on the icon showing the current shortcut 
You execute the new shortcut to record it




PS: I'm not sure if this is what you intended to do.