In the method editor place the cursor over the field, the defined field type will be displayed as a help tip (no need to select the field first as show show in the images below).



A second or two after the mouse has stopped moving a hint will appear displaying how the field is defined, as shown in the images below.



The images below show the difference between hints used for a field defined as a Longint 32bit (4 bytes) and a Longint 64bit (8 bytes).