Here on the Forum the [Edit] button stays available for a few minutes to allow you to fix errors, add details, or think better of the name you just called somebody.
The default Signed Integer data file is N7. The file can be between 1 and 255 elements long, and generally it expands automatically when you use new elements in the program.
All integers in the A-B world are signed, and all addressing begins at zero.
So a 16-bit Integer has 15 data bits, and the highest bit (bit number 15) is the Sign bit. The value range is -32768 to +32767.
What you're seeing with the question marks is just RSLogix 500 not showing you the value of a register inline with the instruction until the program is compiled. Don't sweat it.
The SLC/MicroLogix operating system supports constants, data file registers and both Indexed and Indirect addressing. Stick with ordinary direct addressing to start with, where you designate the Data File Type, the Data File Element, and sometimes the Data File Sub-Element.
"N7:1" tells the operating system you're referring to an Integer data file, file 7, word 1.
"N7:1/2" tells the operating system you're referring to an Integer data file, file 7, word 1, bit 02.