Screen Sizes

Scroll

Context Alignment

Size & Contrast

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>

>

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Don't put too much

on the screen

Hide data and provide options

Use white space

To Zip or not to Zip

Ask 

Why did I zip it ?

Don't do it !

Contrast is too low or too strong

The padding is wrong

Breaks the Google Material design

Pay attention to details

a 1px border does makes the difference

Wrong Context, Padding & Alignment

Wrong use of the floating button