I have published the new version of the User Manual of the Semi-Automatic Classification Plugin v. 3.0.7 for QGIS.
This new documentation illustrates the new functions of the Semi-Automatic Classification Plugin v. 3. Moreover, brief videos showing the tools in action are integrated in the manual.
It is possible to download the User Manual (licensed under a Creative Commons Attribution-ShareAlike 4.0 Unported License) from this link.
The following is the content User Manual: