Choose
Buffers > Compile
or click 
in the toolbar to compile all the code in the current buffer.
Choose Expression > Compile Region to compile the Lisp code in the current region.
Choose
Definitions > Compile
or click 
in the toolbar to compile the current definition.
During compilation, the Editor tool temporarily displays compiler output in the Output tab. Once compilation has finished, press
Space
to display the current buffer once again. You can view the output at any time by clicking the Output tab of the Editor.