Dear Jan,
I hrave not X3 But I guess you can set it manually. Please try the following that i have put here from sonar manual,hopefully could help you.
Note: The SPACEBAR is now “globally” bound to the Play/stop button, so that when you have
a plug-in window open, you can still start and stop playback with the SPACEBAR.
menu.
To create a key binding using the computer keyboard1. Go to Edit > Preferences > Customization - Key Bindings.
2. Check Computer in the Type of Keys list.
3. To quickly scroll to the key or key combination you want, click the Locate Key button, and then
press the key or keys you want to use.
4. Highlight the key combination you want to use in the Key list. Keys on the number pad appear as
Num “n.” If a key or combination is already bound to a global command by default, the name of
the key appears in bold text, and the command it is bound to appears at the bottom of the Key
Bindings dialog under Global Key Assignment. Binding a key or combination to a command
and clicking OK overwrites any default binding for that key or combination.
5. In the Bind Context menu, select the context in which you want to use the key binding.
6. Highlight the command you want to assign from the Function list.
7. Click Bind to bind the key combination to the command.
SONAR places an asterisk next to the key(s) that you chose, and draws a line from the
highlighted key(s) to the command that the key(s) will trigger. Any keys that are assigned to
commands have asterisks next to them. Any commands that have keys assigned to them list the
keys in the Computer column and/or the MIDI column.
8. Repeat steps 3 through 7 for all the keys you want to bind.
9. If you want to save these key bindings for other sessions, make sure that the Save Changes for
Next Session check box is checked.
10. Click OK when you are done.
For more Information please check sonarX user manual.
Regards
Ramtin