Moderator message:
This is a basic question. I recommend to go through the Getting started section in help.sap.com to really get the basics of SAP like F1 field help
here is a link:
Help on Fields and Field Input - SAP Library - SAP Library
the IMG has as well documentation, you only need to click the papersheet icon in front of the IMG activity
All this is common and as well available in SD, so being and SD consultant is not an excuse.