ENVI tutorials are available online.

Contents of tutorials:
Introduction

ENVI Quick Start

ENVI Tutorial #1: Introduction to ENVI

ENVI Tutorial #2: Multispectral Classification

ENVI Tutorial #3: Image Georeferencing and Registration

ENVI Tutorial #4: Mosaicking Using ENVI

ENVI Tutorial #5: Vector Overlay and GIS Analysis

ENVI Tutorial #6: Map Composition Using ENVI

ENVI Tutorial #7: Introduction to Hyperspectral Data and Analysis

ENVI Tutorial #8: Basic Hyperspectral Analysis

ENVI Tutorial #9: Selected Mapping Methods Using Hyperspectral Data

ENVI Tutorial #10: Advanced Hyperspectral Analysis

ENVI Tutorial #11: Hyperspectral Signatures and Spectral Resolution

ENVI Tutorial #12: Vegetation Hyperspectral Analysis Case History

ENVI Tutorial #13: Near-shore Marine Hyperspectral Case History

ENVI Tutorial #14: Multispectral Processing using ENVI’s Hyperspectral Tools

ENVI Tutorial #15: Basic SAR Processing and Analysis

ENVI Tutorial #16: Polarimetric SAR Processing and Analysis

ENVI Tutorial #17: Analysis of DEMs and TOPSAR

ENVI Tutorial #18: Introduction to ENVI User Functions