SPRO stands for SAP PROJECT REFERENCE OBJECT. It is the transaction for IMPLEMENTATION GUIDE for most of the SAP Applications. SPRO holds almost all customizations and all the configurations that an application require. You can find most frequently used functionalities of an application within SPRO under respective application nodes. It is used to configure the setting as per your client requirement by using the standard setting present in the system. This where you can do all the SAP configuration work.
If you want your own entry there then you need to use SIMGH transaction for that.
SPRO is origionally taken from German text : Projektbearbeitung
In English it means: treatment of projects
So its SAP PROjektbearbeitung : SPRO
Note: It is a German software translated to English.
To print SPRO IMG, one need to follow these steps:
SPRO - Click Setting - User-Specific
Under General (Customizing Projects) - Un-Tick All
If you go into SPRO -> SAP Reference IMG, the Print button is No Longer in Grey. You can then Print or Download it.