All software come with manual file that contains instructions how to use the software. 
This file resides in the installation folder of the software. Normally there is a link to User guide manual under the Help menu on the main toolbar.
Pressing F1 on the keyboard while the software is running will call the manual in most programs.
The manual file is in specific file format .chm more recent software tend to include manual in PDF format which is located in the install folder of the software.