Web developer ruler tool

Improve this question. Add a comment. Active Oldest Votes. Improve this answer. Vignesh Raja 6, 1 1 gold badge 26 26 silver badges 35 35 bronze badges. Gideon Pyzer Gideon Pyzer BotondVajna I just found out where they are today, they're visible when you hover over an element in the elements panel, pretty useless if you ask me.

I don't understand the point of having those rulers show up only when hovering an element, since element's dimensions are already printed in a handy popup. DrLightman I'd say to better discern how they line up with other elements on the page. I'm definitely finding it useful.

I needed to restart Chrome to see rulers. Show 3 more comments. Click More Options and then select Show rulers. Kayce Basques Kayce Basques At first I was like, wow this is a really well formatted answer, great images! Then I saw who posted it Are the rulers that feature produce intended to only be shown when hovering the mouse over a element in the Elements tab in the devtools, or are we using it the wrong way?

The "problem" with the rulers and features of the "Device toolbar" mode, is that when you use it, the page no longer look and render like it did right before you pressed the "Toggle device toolbar" button, and that can often be a problem. It would be great if this feature provided the ability to drag out guides and take measurements.

Please enable JavaScript in your browser to enjoy a better experience. View horizontal and vertical rulers Firefox has a ruler tool that displays both horizontal and vertical rulers with pixel units on the page. Once the toolbar appears at the bottom of the page, type rulers.

Pess Enter. To make this appear on the developer tools window: Go to "Toolbox Options". Under the "Available Toolbox Buttons" section, check the " Toggle rulers for the page " checkbox. Take screenshots using CSS selectors Although the Firefox toolbar lets you take screenshots of the full page or visible portions, in my opinion the CSS selector method is more useful for capturing screenshots of individual elements as well as for elements that are visible on mouse-hover only like menus.

Press enter. To make this appear on the developer tools window: Click "Toolbox Options" and under "Available Toolbox Buttons" section. Check " Take a fullpage screenshot" checkbox.

Pick colors from web pages Firefox has a built-in color picker tool by the name of "Eyedropper". View page layout in 3D Viewing webpages in 3D helps with layout problems. View browser style Browser Styles consist of two types: the default style a browser assigns for every element, and the browser-specific styles the ones with the browser prefix. Next to the Tools tab group are optional error and issues shortcuts. The shortcuts display when JavaScript errors or issues occur on the current webpage.

To open the Console and learn about the error, select the JavaScript Errors button. The Open Issues to view issues Issues button is a blue message icon followed by the number of issues. To open the Issues tool, select the Issues button. The Settings button displays a gear icon.

To open DevTools Settings webpage, select the Settings button. The Settings webpage displays a menu to change Preferences , turn on Experiments , and much more. The Send Feedback button displays a torso with a chat bubble next to it. To open the Send Feedback dialog, select the Send Feedback button. The Send Feedback dialog allows you to enter information to describe what happened and automatically includes a screenshot. Use Send Feedback to connect with DevTools team to report problems, issues, or suggest ideas.

The Customize and control DevTools It allows you to define where to dock DevTools, search, open different tools, and much more. DevTools provides lots of features and functionality to use with your web product. You can access the different parts of DevTools in many ways, but often a fast way is to use the command menu.

In the command menu, the tools are called "panels"; for example, the Elements tool is called the Elements panel. The command menu allows you to type commands to display, hide, or run features in DevTools. With the command menu open, enter the word changes , and then select Drawer: Show Changes. The Changes tool opens, which is useful when you edit CSS. In this case, the command menu provides a fast alternative to selecting More Tools You can customize DevTools to meet your needs for the way you work.

To change settings, do any of the following:.