Is the source browser disbled in the evaluation version? The Source Browser menu item under View is greyed out. It is possible to check the browse information button in the output tab in the Options for Target dialog, after first clicking Create Library, then clicking Create Executable. Doing this adds BROWSE to the ARM C compiler control string. Highlightig a variable in a source file and presseing F12 generates an error message "No browse information available in...".
The source browser is currently not implemented in the ARM toolchain since the compiler does not yet generate the related information. It will come in one of the next releases. Reinhard