Idea of Up Icon
Arrow up is made of 3 lines the main line starting from bottom of page up towards the top of page .then there is two identical lines that both start at the top of the main line and then at an angel away from main line and downwards which stops all most halfway down main line
This Up icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.