The following keys are valid in the Inquiry screens as well as in lookup and detail scan mode:

F1-F16	-	On inquiry screen, it brings up the linked screens as indicated by the prompt on the first line. For lookup mode, only the F1 is active and it just returns the item pointed to by the blinking brackets to the calling field.
shift F1-F16	-	For inquiry screens only, brings up the linked screens, mostly related to the equivalent unshifted Function key.
h	-	move the cursor to the first detail line on the current screen.
m	-	move the cursor to the middle of the detail lines.
l	-	move the cursor to the last detail line of the current screen.
F	-	prompts for the SEARCH key and searches forward.
B	-	prompts for the SEARCH key and searches backward.
N	-	SEARCH forward using the previous SEARCH key.
P	-	SEARCH backward using the previous SEARCH key.
L	-	GO TO Line Number specified.
G	-	GO TO Page Number specified.
SPACE	-	display additional prompts. The prompt line will indicate is there's addition prompt by displaying "..." at the beginning or end of the prompt.
W	-	display inquiry status... where you are.
NEXT PAGE	-	GO TO Next Page.
PREV PAGE	-	GO TO Previous Page.
1 - 9	-	BRINGS UP THE PAGE
HOME	-	GO TO The First Page.
Shift-HOME	-	GO TO The Last Page
CTRL-P	-	Screen dump, valid only if a dump printer is assigned to you by your system Administrator. Screen Dump prints exact content of the screen to the printer.
PRINT/SEND	-	Print dump, valid only if a dump printer is assigned to you by your system administrator. Print Dump prints all the details of the screen in a 66 lines/page format.
U,D,L	-	Highlight the detail line with [U]nderline, [D]im reverse or [R]everse attribute.
?	-	Show you the screen name and other values used by the programmer.
C	-	Clear Totals.
T	-	Grand Total.
On some fields:
S	-	Screen Total.
+	-	Add detail to total.
-	-	Subtract detail from total.