Introduction

You can easily change numeric values in DevTools. This is a handy feature for when you want to quickly prototype CSS property values.
 

Instructions

For example, if the Styles Pane has a CSS rule such as:
 

body {
    transform: rotate(0deg);
}

You can place your cursor on the numeric portion (0deg) and use the following key combinations:

• Alt + Up / Alt + Down increment/decrement by 0.1
  • 0deg ⮕ 0.1deg ⮕ 0.2deg
• Up / Down increment/decrement by 1
  • 0deg ⮕ 1deg ⮕ 2deg
• Shift + Up / Shift + Down increment/decrement by 10
  • 0deg ⮕ 10deg ⮕ 20deg
• Cmd + Up / Cmd + Down increment/decrement by 100
  • 0deg ⮕ 100deg ⮕ 200deg
  • On Windows: Ctrl + Up / Ctrl + Down

Bonus tip with HTML elements

As a bonus tip, there is basic support for incrementing and decrementing numeric values on the Elements Panel. For example, given an element like:

<div data-item="item1"></div>

You can use the shortcuts mentioned earlier to increment and decrement the numeric value (item1 ⮕ item2 ⮕ item3, etc.) within the HTML markup.
 

Here's the web version of this email: umaar.com/dev-tips/233-quick-change-numeric-values