I have just bought a Macbook pro and I have to program. But I can not figure out how to insert this symbol "+". On the net I could not find anything.
How insert “+” from MacBook italian keyboard
keyboard
Related Solutions
FN + Return = Insert
(MacBook Air 13)
Also Works on MacBook Pro.
It's determined by the list in the "Language & Text" preference pane's Language tab.
The plist file that is chosen is the one that matches with the language in the list that is highest to the top that has a match.
For example: if your list shows "Canadian English, UK English, Spanish, …", Keyboard-en_CA.plist will be chosen, as it best matches Canadian English. If the list is "Português, Suomi, English, …", Keyboard-en.plist will be chosen, as it best matches English, which is the language closest to the top that is available. (The last is assuming that Portuguese and Finnish plists aren't available.) If there are no languages in the list that have plists present, the Keyboard_default.plist would likely be chosen.
Best Answer
If you actually can't find the key "+" by System Preferences > Keyboard > [X] Show keyboard in menu and testing all modifier keys with Apple's keyboard overview app, you might use Terminal.
Open and type
xmodmap -pk.This will give you a list of key names & values. Copy contents to BBEdit/TextEdit, search for "plus".
If it's in a first place the key must be accessible directly.
Second place will be combined with shift, third place with option, fourth with shift & option.
So: look for the line containing "plus", somewhere, and note down the first key's name.
That's your key "+" – to be pressed with or without modifier(s).