Photoshop

Adobe Photoshop (PS) is a powerful and professional image-editing program that is designed to create and manipulate digital imagery. It is pixel-based (aka "raster") and allows you to paint/draw as well.

Adobe Photoshop Beginner Tutorials

https://helpx.adobe.com/photoshop/tutorials.html

Retouch Images

Photoshop Selections Tutorials

Types of Selection Tools

https://helpx.adobe.com/photoshop/how-to/types-selection-tools.html

Marquees & Quick Selection

https://helpx.adobe.com/photoshop/how-to/selection-tools-basics.html

YouTube: Select & Mask in PS 

Marquees & Lassos

https://video.tv.adobe.com/v/4263/

https://helpx.adobe.com/photoshop/using/selecting-lasso-tools.html

Magic Wand

https://helpx.adobe.com/photoshop/how-to/select-by-color-magic-wand.html

Object Selection Tool

YouTube: Object Selection Tool in PS

Photoshop Contextual Task Bar

NEW!! YouTube: 10+ Ways to Use...

Photoshop Layering & Masking

https://helpx.adobe.com/photoshop/how-to/composite-nature-photography-with-layer-blend-mode.html

YouTube: Photoshop: Understanding Layers

YouTube: Learn to Mask in 2 minutes!

YouTube: How to Use Layer Mask